CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net loss	$ (2,241)	$ (1,881)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization of stock-based compensation	433	94
Amortization of deferred debt issuance costs and debt discount	0	196
Amortization of trademark	33	33
Gain on settlement of customer refund	(68)	0
Provision for doubtful accounts	20	17
Changes in operating assets and liabilities:
Accounts receivable	19	279
Inventories	467	142
Prepaid expenses and other	198	83
Accounts payable	399	536
Accrued expenses	(313)	(270)
Customer refund	(547)	0
Due to related party	(10)	24
Net cash used in operating activities	(1,610)	(747)
Cash flows from financing activities
Proceeds from issuance of preferred stock, net	0	464
Issuance of common stock net of issuance cost	307	0
Proceeds from issuance of bridge financing	0	406
Proceeds from credit facility	0	392
Payments on credit facility	0	(460)
Deferred financing costs	0	(132)
Net cash provided by financing activities	307	670
Net increase in cash	(1,303)	(77)
Cash, beginning of the year	1,453	119
Cash, end of the year	150	42
Cash paid during the period for:
Interest	1	15
Non-cash investing and financing activities:
Deferred IPO costs	$ 0	$ 59