Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net revenues	$ 3,439	$ 3,231	$ 6,295	$ 6,166
Cost of goods sold	2,634	1,809	4,570	3,316
Gross profit	805	1,422	1,725	2,850
Operating expenses:
Engineering	228	128	351	249
Sales and marketing	306	354	614	649
General and administrative	298	466	651	888
Total operating expenses	832	948	1,616	1,786
Income (loss) from operations	(27)	474	109	1,064
Other income	16		21
Income (loss) before income taxes	(11)	474	130	1,064
Provision for income taxes	0	0	0	0
Net income (loss)	$ (11)	$ 474	$ 130	$ 1,064
Earnings per share:
Basic (in dollars per share)	$ (0.01)	$ 0.23	$ 0.07	$ 0.52
Diluted (in dollars per share)	$ (0.01)	$ 0.23	$ 0.07	$ 0.51
Shares used in per share calculation:
Basic (in shares)	1,952	2,048	1,972	2,048
Diluted (in shares)	1,952	2,094	1,972	2,098