Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Fair Value Measurements - Financial Instruments (Details)

v3.5.0.2
Note 5 - Fair Value Measurements - Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Cash [Member] | Reported Value Measurement [Member]    
Cash and cash equivalents, fair value disclosure $ 1,693 $ 7,534
Cash [Member] | Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents, fair value disclosure 1,693 7,534
Cash [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents, fair value disclosure 1,693 7,534
Cash [Member] | Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents, fair value disclosure
Cash [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents, fair value disclosure
Money Market Funds [Member] | Reported Value Measurement [Member]    
Cash and cash equivalents, fair value disclosure 776
Money Market Funds [Member] | Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents, fair value disclosure 776
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents, fair value disclosure 776
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents, fair value disclosure
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents, fair value disclosure
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents, fair value disclosure 1,693  
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents, fair value disclosure  
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents, fair value disclosure  
Reported Value Measurement [Member] | US Treasury Securities [Member]    
Investments, fair value disclosure 1,115
Reported Value Measurement [Member] | Marketable Securities, Money Market Funds [Member]    
Investments, fair value disclosure   48
Reported Value Measurement [Member] | Mutual Funds [Member]    
Investments, fair value disclosure   58
Reported Value Measurement [Member] | Government Agency Securities [Member]    
Investments, fair value disclosure   131
Reported Value Measurement [Member] | Asuragen [Member]    
Contingent consideration, deferred payments 3,247 4,628
Reported Value Measurement [Member] | RedPath [Member]    
Contingent consideration, deferred payments 14,653 13,921
Reported Value Measurement [Member]    
Cash and cash equivalents, fair value disclosure 1,693 8,310
Investments, fair value disclosure   1,352
Contingent consideration, deferred payments 17,900 18,549
Estimate of Fair Value Measurement [Member] | US Treasury Securities [Member]    
Investments, fair value disclosure 1,115
Estimate of Fair Value Measurement [Member] | Marketable Securities, Money Market Funds [Member]    
Investments, fair value disclosure   48
Estimate of Fair Value Measurement [Member] | Mutual Funds [Member]    
Investments, fair value disclosure   58
Estimate of Fair Value Measurement [Member] | Government Agency Securities [Member]    
Investments, fair value disclosure   131
Estimate of Fair Value Measurement [Member] | Asuragen [Member]    
Contingent consideration, deferred payments 3,247 4,628
Estimate of Fair Value Measurement [Member] | RedPath [Member]    
Contingent consideration, deferred payments 14,653 13,921
Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents, fair value disclosure 1,693 8,310
Investments, fair value disclosure   1,352
Contingent consideration, deferred payments 17,900 18,549
Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]    
Investments, fair value disclosure 1,115
Fair Value, Inputs, Level 1 [Member] | Marketable Securities, Money Market Funds [Member]    
Investments, fair value disclosure   48
Fair Value, Inputs, Level 1 [Member] | Mutual Funds [Member]    
Investments, fair value disclosure   58
Fair Value, Inputs, Level 1 [Member] | Government Agency Securities [Member]    
Investments, fair value disclosure   131
Fair Value, Inputs, Level 1 [Member] | Asuragen [Member]    
Contingent consideration, deferred payments
Fair Value, Inputs, Level 1 [Member] | RedPath [Member]    
Contingent consideration, deferred payments
Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents, fair value disclosure   8,310
Investments, fair value disclosure   1,352
Contingent consideration, deferred payments
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]    
Investments, fair value disclosure
Fair Value, Inputs, Level 2 [Member] | Marketable Securities, Money Market Funds [Member]    
Investments, fair value disclosure  
Fair Value, Inputs, Level 2 [Member] | Mutual Funds [Member]    
Investments, fair value disclosure  
Fair Value, Inputs, Level 2 [Member] | Government Agency Securities [Member]    
Investments, fair value disclosure  
Fair Value, Inputs, Level 2 [Member] | Asuragen [Member]    
Contingent consideration, deferred payments
Fair Value, Inputs, Level 2 [Member] | RedPath [Member]    
Contingent consideration, deferred payments
Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents, fair value disclosure  
Investments, fair value disclosure  
Contingent consideration, deferred payments
Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]    
Investments, fair value disclosure
Fair Value, Inputs, Level 3 [Member] | Marketable Securities, Money Market Funds [Member]    
Investments, fair value disclosure  
Fair Value, Inputs, Level 3 [Member] | Mutual Funds [Member]    
Investments, fair value disclosure  
Fair Value, Inputs, Level 3 [Member] | Government Agency Securities [Member]    
Investments, fair value disclosure  
Fair Value, Inputs, Level 3 [Member] | Asuragen [Member]    
Contingent consideration, deferred payments 3,247 4,628
Fair Value, Inputs, Level 3 [Member] | RedPath [Member]    
Contingent consideration, deferred payments 14,653 13,921
Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents, fair value disclosure  
Investments, fair value disclosure  
Contingent consideration, deferred payments $ 17,900 $ 18,549