| Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block] | 
A rollforward of the carrying value of the contingent consideration from continuing operations from January 1, 2015 to December 31, 2015 is as follows: 
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   | 2015 |  
|   | January 1, | Additions | 
Adjustment to Fair Value
 | December 31, |  
| Asuragen  | $ | 4,476 | 
 | $ | 152 | 
 | $ | — | 
 | $ | 4,628 | 
 |  
| RedPath  | 22,066 | 
 | — | 
 | (8,145 | ) | 13,921 | 
 |  
|   | $ | 26,542 | 
 | $ | 152 | 
 | $ | (8,145 | ) | $ | 18,549 | 
 |  | 
| Fair Value, by Balance Sheet Grouping [Table Text Block] | 
The valuation methodologies used for the Company's financial instruments measured on a recurring basis at fair value, including the general classification of such instruments pursuant to the valuation hierarchy, is set forth in the tables below. 
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   | As of December 31, 2015 |   | Fair Value Measurements |  
|   | Carrying |   | Fair |   | As of December 31, 2015 |  
|   | Amount |   | Value |   | Level 1 |   | Level 2 |   | Level 3 |  
| Assets: |   |   |   |   |   |   |   |   |   |  
| Cash and cash equivalents: |   |   |   |   |   |   |   |   |   |  
| Cash | $ | 7,534 | 
 |   | $ | 7,534 | 
 |   | $ | 7,534 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Money market funds | 776 | 
 |   | 776 | 
 |   | 776 | 
 |   | — | 
 |   | — | 
 |  
|   | $ | 8,310 | 
 |   | $ | 8,310 | 
 |   | $ | 8,310 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Marketable securities: |   | 
 |   |   | 
 |   |   | 
 |   |   | 
 |   |   | 
 |  
| Money market funds | $ | 48 | 
 |   | $ | 48 | 
 |   | $ | 48 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Mutual funds | 58 | 
 |   | 58 | 
 |   | 58 | 
 |   | — | 
 |   | — | 
 |  
| U.S. Treasury securities | 1,115 | 
 |   | 1,115 | 
 |   | 1,115 | 
 |   | — | 
 |   | — | 
 |  
| Government agency securities | 131 | 
 |   | 131 | 
 |   | 131 | 
 |   | — | 
 |   | — | 
 |  
|   | $ | 1,352 | 
 |   | $ | 1,352 | 
 |   | $ | 1,352 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Liabilities: |   |   |   |   |   |   |   |   |   |  
| Contingent consideration: |   |   |   |   |   |   |   |   |   |  
| Asuragen | $ | 4,628 | 
 |   | $ | 4,628 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 4,628 | 
 |  
| RedPath | 13,921 | 
 |   | 13,921 | 
 |   | — | 
 |   | — | 
 |   | 13,921 | 
 |  
|   | $ | 18,549 | 
 |   | $ | 18,549 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 18,549 | 
 | 
 
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   | As of December 31, 2014 |   | Fair Value Measurements |  
|   | Carrying |   | Fair |   | As of December 31, 2014 |  
|   | Amount |   | Value |   | Level 1 |   | Level 2 |   | Level 3 |  
| Assets: |   |   |   |   |   |   |   |   |   |  
| Cash and cash equivalents: |   |   |   |   |   |   |   |   |   |  
| Cash | $ | 6,836 | 
 |   | $ | 6,836 | 
 |   | $ | 6,836 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Money market funds | 16,275 | 
 |   | 16,275 | 
 |   | 16,275 | 
 |   | — | 
 |   | — | 
 |  
|   | $ | 23,111 | 
 |   | $ | 23,111 | 
 |   | $ | 23,111 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Marketable securities: |   | 
 |   |   | 
 |   |   | 
 |   |   | 
 |   |   | 
 |  
| Money market funds | $ | 48 | 
 |   | $ | 48 | 
 |   | $ | 48 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Mutual funds | 59 | 
 |   | 59 | 
 |   | 59 | 
 |   | — | 
 |   | — | 
 |  
| U.S. Treasury securities | 1,070 | 
 |   | 1,070 | 
 |   | 1,070 | 
 |   | — | 
 |   | — | 
 |  
| Government agency securities | 317 | 
 |   | 317 | 
 |   | 317 | 
 |   | — | 
 |   | — | 
 |  
|   | $ | 1,494 | 
 |   | $ | 1,494 | 
 |   | $ | 1,494 | 
 |   | $ | — | 
 |   | $ | — | 
 |  
| Liabilities: |   |   |   |   |   |   |   |   |   |  
| Contingent consideration: |   |   |   |   |   |   |   |   |   |  
| Asuragen  | $ | 4,476 | 
 |   | $ | 4,476 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 4,476 | 
 |  
| RedPath  | 22,066 | 
 |   | 22,066 | 
 |   | — | 
 |   | — | 
 |   | 22,066 | 
 |  
|   | $ | 26,542 | 
 |   | $ | 26,542 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 26,542 | 
 |  | 
| Fair Value Measurements, Nonrecurring [Table Text Block] | 
The following table summarizes the goodwill of the Company measured at fair value on a nonrecurring basis as of December 31, 2015 and 2014:    
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   |   |   |   | Fair Value Measurements as of |  
|   |   | Carrying Amount as of |   | December 31, 2015 |  
|   |   | December 31, 2015 |   | Level 1 |   | Level 2 |   | Level 3 |  
|   |   |   |   |   |   |   |   |   |  
| Goodwill |   | $ | — | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | — | 
 |  
|   |   |   |   |   |   |   |   |   |  
|   |   | Carrying Amount as of |   | Fair Value Measurements as of |  
|   |   | December 31, 2014 |   | December 31, 2014 |  
|   |   |   |   |   |   |   |   |   |  
| Goodwill |   | $ | 15,545 | 
 |   | $ | — | 
 |   | $ | — | 
 |   | $ | 15,545 | 
 |  |