Condensed Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Total revenues	$ 1,542	$ 690
Cost of revenues	937	406
Gross profit	605	284
Operating expenses:
Selling, general and administrative	4,978	2,140
Research and development	1,065	534
Total operating expenses	6,043	2,674
Loss from operations	(5,438)	(2,390)
Other income (expense):
Interest income	2	44
Other	7	0
Other income (expense)	9	44
Net loss	$ (5,429)	$ (2,346)
Net loss per basic common share	$ (0.14)	$ (0.08)
Weighted average common shares used to compute net loss per basic common share	37,618,629	29,976,825
Comprehensive loss:
Net loss	$ (5,429)	$ (2,346)
Net unrealized gain on short-term investments	2	0
Comprehensive loss	(5,427)	(2,346)
Product Sales
Revenues:
Total revenues	1,427	675
Other Revenue
Revenues:
Total revenues	$ 115	$ 15