Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 13,050,000	$ 16,647,000
Short-term investments	30,002,000	24,994,000
Accounts receivable, net	2,623,000	1,871,000
Inventories, net	2,837,000	2,655,000
Prepaid expenses and other current assets	824,000	760,000
Total current assets	49,336,000	46,927,000
Property and equipment, net	508,000	357,000
Operating lease right-of-use asset, net	93,000	139,000
Intangible assets, net	1,395,000	1,397,000
Other assets	9,000	13,000
Total assets	51,341,000	48,833,000
Current liabilities:
Accounts payable	1,280,000	1,232,000
Accrued liabilities	910,000	721,000
Customer deposits	10,000	2,000
Deferred revenue	186,000	16,000
Operating lease liability - short term	94,000	94,000
Business acquisition liability - short term	97,000	275,000
Total current liabilities	2,577,000	2,340,000
Long-term liabilities:
Operating Lease Liability - long term	8,000	56,000
Business acquisition liability - long term	0	23,000
Total long-term liabilities	8,000	79,000
Total liabilities	2,585,000	2,419,000
Stockholders' equity:
Preferred stock - 5,000,000 authorized; par value $0.0001 per share; none issued and outstanding	0	0
Common stock - 150,000,000 authorized; par value $0.0001 per share; 39,911,390 and 37,554,162 shares issued and outstanding each period, respectively	4,000	4,000
Additional paid-in capital	87,277,000	71,705,000
Accumulated deficit	(38,538,000)	(25,310,000)
Accumulated other comprehensive income	13,000	15,000
Total stockholders' equity	48,756,000	46,414,000
Total liabilities and stockholders' equity	$ 51,341,000	$ 48,833,000