CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue:
Product revenue	$ 79,446	$ 60,060	$ 46,878
Service revenue	14,616	9,979	1,550
Total revenue	94,062	70,039	48,428
Cost of revenue, exclusive of depreciation and amortization shown below:
Product cost	59,901	45,829	37,073
Service cost	5,276	3,299	739
Total cost of revenue	65,177	49,128	37,812
Gross profit	28,885	20,911	10,616
Operating (income) expenses:
Research and development	3,811	2,877	1,660
Sales and marketing	3,860	2,880	2,272
General and administrative	11,831	7,115	3,970
Change in fair value of acquisition-related contingent consideration (income) expense (income)	(338)	(2,059)	790
Change in fair value of acquisition-related consideration expense	55
Depreciation and amortization	5,115	3,933	1,817
Total operating expenses	24,334	14,746	10,509
Income from operations	4,551	6,165	107
Other (income) expense:
Change in fair value of warrant liability	(639)	2,786	269
Interest expense	4,488	5,915	1,354
Loss on extinguishment of debt	6,411
Total other expense	10,260	8,701	1,623
Loss before income taxes	(5,709)	(2,536)	(1,516)
Income tax expense (benefit)	541	328	(409)
Net loss	(6,250)	(2,864)	(1,107)
Decretion (accretion) of redeemable convertible preferred stock	2,439	(9,966)	(3,884)
Net loss attributable to common stockholders:
Basic	(3,811)	(12,830)	(4,991)
Diluted	$ (6,889)	$ (12,830)	$ (4,991)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (0.51)	$ (2.97)	$ (1.23)
Diluted (in dollars per share)	$ (0.59)	$ (2.97)	$ (1.23)
Weighted average common shares outstanding
Basic (in shares)	7,486,131	4,318,779	4,052,590
Diluted (in shares)	11,591,210	4,318,779	4,052,590