CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (4,345)	$ (77)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	3,564	2,139
Amortization of deferred financing costs and debt discount	46	1,176
Payment of imputed interest on debt		(589)
Deferred taxes	238	133
Stock-based compensation	6,837	258
Change in fair value of warrant liability		(13)
Change in fair value of acquisition-related contingent consideration	37	99
Other noncash items	12
Changes in operating assets and liabilities:
Accounts receivable, net	(1,901)	(47)
Inventories	(291)	(545)
Rebates receivable	(13)	313
Prepaid expenses and other current assets	105	(207)
Other assets		76
Accounts payable	91	929
Accrued expenses and other liabilities	1,970	(754)
Other long-term liabilities	466	4,023
Net cash provided by operating activities	6,816	6,914
Cash flows from investing activities:
Purchases of property and equipment	(1,950)	(2,901)
Software development costs	(1,514)	(576)
Purchase of intangible assets		(29)
Change in restricted cash		200
Net cash used in investing activities	(3,464)	(3,306)
Cash flows from financing activities:
Payments for repurchase of common stock	(959)
Proceeds from exercise of stock options	179
Payments for employee taxes for shares withheld	(2,123)
Payments for debt financing costs	(18)	(113)
Borrowings on line of credit		4,500
Payments of acquisition-related consideration		(180)
Payments of initial public offering costs	(132)	(982)
Payments of contingent consideration	(1,498)	(1,895)
Repayments of long-term debt	(335)	(2,665)
Net cash used in financing activities	(4,886)	(1,335)
Net (decrease) increase in cash	(1,534)	2,273
Cash, beginning of period	4,345	2,026
Cash, end of period	2,811	4,299
Supplemental disclosure of cash flow information
Acquisition of equipment under capital leases	50	1,081
Additions to property, equipment, and software development purchases included in accounts payable	553	186
Deferred offering costs included in accounts payable		1,291
Cash paid for interest	$ 106	1,615
Accretion of redeemable convertible preferred stock		$ 202