Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net revenues	$ 3,703	$ 3,154	$ 9,998	$ 9,320
Cost of goods sold	2,749	1,901	7,319	5,217
Gross profit	954	1,253	2,679	4,103
Operating expenses:
Engineering	122	123	473	372
Sales and marketing	368	351	982	1,000
General and administrative	427	374	1,078	1,262
Total operating expenses	917	848	2,533	2,634
Income from operations	37	405	146	1,469
Other income	12		33
Income before income taxes	49	405	179	1,469
Provision for income taxes	0	0	0
Net income	$ 49	$ 405	$ 179	$ 1,469
Earnings per share:
Basic (in dollars per share)	$ 0.03	$ 0.20	$ 0.09	$ 0.72
Diluted (in dollars per share)	$ 0.03	$ 0.20	$ 0.09	$ 0.70
Shares used in per share calculation:
Basic (in shares)	1,922	2,048	1,967	2,048
Diluted (in shares)	1,922	2,065	1,967	2,088