Fair Value Measurements - Schedule of aggregate fair values of the Company's common stock warrants and contingent consideration for which fair value is determined by Level 3 inputs (Details) - Level 3 $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Warrants
Fair values of the Company's liabilities determined by Level 3 inputs
Balance at beginning of the period	$ 99
Fair value of warrants to be issued upon borrowing under the Silicon Valley Bank term loan (Note 9)	88
Change in fair value	(9)
Balance at the end of the period	178
Deferred Consideration Liability
Fair values of the Company's liabilities determined by Level 3 inputs
Balance at beginning of the period	395
Change in fair value	3
Balance at the end of the period	398
Contingent Consideration Liability
Fair values of the Company's liabilities determined by Level 3 inputs
Balance at beginning of the period	1,242
Change in fair value	61
Balance at the end of the period	$ 1,303