Annual report pursuant to Section 13 and 15(d)

Note 5 - Fair Value Measurements (Details Textual)

v3.7.0.1
Note 5 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Mar. 23, 2017
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ (11,860) $ (7,993)  
Business Combination, Contingent Consideration, Liability, Current 260 659  
Business Combination, Contingent Consideration, Liability, Noncurrent 7,254 17,890  
Debt to Equity Conversion [Member] | Senior Secured Note [Member] | Subsequent Event [Member]      
Debt Instrument, Face Amount     $ 9,340
Debt Instrument, Face Amount Less Discount     $ 8,900
Asuragen [Member]      
Business Combination, Contingent Consideration, Liability 4,500    
RedPath [Member]      
Business Combination, Contingent Consideration, Liability 22,100    
Asuragen and Redpath [Member]      
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability (11,900) $ (8,000)  
Business Combination, Contingent Consideration, Liability, Current 300    
Business Combination, Contingent Consideration, Liability, Noncurrent $ 7,200