Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ 199	$ (1,046)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	522	369
Stock-based compensation	71	84
Deferred income taxes	65	(30)
Gain on sale of equipment		(110)
Change in operating assets and liabilities:
Accounts receivable	156	1,135
Inventories	2,905	1,366
Prepaid expenses and other assets	42	196
Income taxes receivable	322
Accounts payable, accrued expenses, and other liabilities	296	(289)
Total adjustments to net income (loss)	4,379	2,721
Net cash provided by operating activities	4,578	1,675
Cash flows from investing activities:
Purchase of property and equipment	(17)	(101)
Proceeds from sale of property and equipment	500	110
Cash paid for leasehold improvements	(247)
Reimbursement for leasehold improvements	110
Net cash provided by investing activities	346	9
Cash flows from financing activities:
Payments for debt issuance costs	(141)
Proceeds from exercise of stock options		41
Proceeds from PPP loan	600
Repayment of PPP loan	(600)
Net cash (used in) provided by financing activities	(141)	41
Net increase in cash and cash equivalents	4,783	1,725
Cash and cash equivalents, beginning of period	1,094	6,232
Cash and cash equivalents, end of period	$ 5,877	$ 7,957