Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 277	$ (330)
Adjustments to reconcile net income (loss) to net cash (used) provided by operating activities:
Depreciation and amortization	229	186
Stock-based compensation	36	42
Deferred income taxes	107	(104)
Change in operating assets and liabilities:
Accounts receivable	(951)	78
Inventories	429	537
Prepaid expenses and other assets	93	121
Income taxes receivable	(39)
Accounts payable and accrued expenses	(768)	(53)
Total adjustments to net income (loss)	(864)	807
Net cash (used) provided by operating activities	(587)	477
Cash flows from investing activities:
Purchase of property and equipment	(17)	(101)
Proceeds from sale of property and equipment	500
Net cash provided by (used in) investing activities	483	(101)
Cash flows from financing activities:
Payments for debt issuance costs	(64)
Net cash used in financing activities	(64)
Net (decrease) increase in cash and cash equivalents	(168)	376
Cash and cash equivalents, beginning of period	1,094	6,232
Cash and cash equivalents, end of period	926	6,608
Supplemental disclosures:
Cash paid during the period for interest	$ 4	$ 5