CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows used in operating activities:
Net income	$ 612	$ 1,289
Adjustments to reconcile net income to net cash used in operating activities:
Accrued interest added to principal of related party debt	0	4
Stock-based compensation expense	71	61
Noncash lease expense	117	0
Depreciation and amortization	76	84
Changes in operating assets and liabilities:
Accounts receivable	(926)	(1,373)
Inventory	879	(57)
Other assets	(63)	(27)
Lease liabilities	(122)	0
Accounts payable and accrued liabilities	(2,524)	(358)
Other liabilities	(455)	103
Net cash used in operating activities	(2,335)	(274)
Cash flows used in investing activities:
Purchase of property and equipment	(5)	(57)
Net cash used in investing activities	(5)	(57)
Cash flows used in financing activities:
Repayment of debt	(92)	(182)
Net cash used in financing activities	(92)	(182)
Net decrease in cash and cash equivalents	(2,432)	(513)
Cash and cash equivalents at beginning of period	4,268	2,109
Cash and cash equivalents at end of period	1,836	1,596
Supplemental cash flow information:
Cash paid for taxes	1	1
Cash paid for interest	16	50
Noncash change in right-of-use assets	1,220	0
Noncash change in deferred rent	(64)	0
Noncash change in lease liabilities	$ 1,284	$ 0