CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands |
Total |
Common Stock [Member] |
Additional Paid-in Capital [Member] |
Accumulated Deficit [Member] |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance at Dec. 31, 2015 | $ 52,427 | $ 3 | $ 148,484 | $ (96,060) | |||||||||||
| Balance (in shares) at Dec. 31, 2015 | 2,766,891 | ||||||||||||||
| Stock-based compensation | [1] | 5,336 | $ 0 | 5,336 | 0 | ||||||||||
| Stock-based compensation (in shares) | [1] | 101,653 | |||||||||||||
| Issuance of common stock in connection with the contingent consideration of the Celleration, Inc. acquisition | [2] | 2,572 | $ 0 | 2,572 | 0 | ||||||||||
| Issuance of common stock in connection with the contingent consideration of the Celleration, Inc. acquisition (in shares) | [2] | 98,594 | |||||||||||||
| Net settlement on vesting of restricted stock awards | (2) | $ 0 | (2) | 0 | |||||||||||
| Net settlement on vesting of restricted stock awards (in shares) | (234) | ||||||||||||||
| Net loss | (28,243) | $ 0 | 0 | (28,243) | |||||||||||
| Balance at Dec. 31, 2016 | 32,090 | $ 3 | 156,390 | (124,303) | |||||||||||
| Balance (in shares) at Dec. 31, 2016 | 2,966,904 | ||||||||||||||
| Issuance common stock for cash, net of issuance costs of $695 | 5,849 | $ 2 | 5,847 | ||||||||||||
| Issuance common stock for cash, net of issuance costs of $695 (in shares) | 1,639,825 | ||||||||||||||
| Stock-based compensation | [3] | 2,393 | $ 0 | 2,393 | |||||||||||
| Stock-based compensation (in shares) | [3] | 181,936 | |||||||||||||
| Issuance of common stock in connection with the contingent consideration of the Celleration, Inc. acquisition | [4] | 675 | $ 0 | 675 | |||||||||||
| Issuance of common stock in connection with the contingent consideration of the Celleration, Inc. acquisition (in shares) | [4] | 101,243 | |||||||||||||
| Issuance of common stock in connection with the contingent consideration of the Choice Therapeutics acquisition | [5] | 500 | $ 0 | 500 | |||||||||||
| Issuance of common stock in connection with the contingent consideration of the Choice Therapeutics acquisition (in shares) | [5] | 131,579 | |||||||||||||
| Net settlement on vesting of restricted stock awards | (133) | $ 0 | (133) | ||||||||||||
| Net settlement on vesting of restricted stock awards (in shares) | (35,453) | ||||||||||||||
| Net loss | (25,707) | (25,707) | |||||||||||||
| Balance at Dec. 31, 2017 | $ 15,667 | $ 5 | $ 165,672 | $ (150,010) | |||||||||||
| Balance (in shares) at Dec. 31, 2017 | 4,986,034 | ||||||||||||||
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