Balance Sheets - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,376,619	$ 4,335,020
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	8,473,905	16,864,707
Debt Securities, Available-for-Sale	9,402,858	0
Accounts receivable, net	576,281	646,771
Inventories	1,748,115	1,614,987
Prepaid expenses and other current assets	508,391	645,502
Total current assets	23,086,169	24,106,987
Fixed assets, net	155,397	165,619
Operating Lease, Right-of-Use Asset	342,082	370,609
Other Assets, Noncurrent	26,400	26,400
Total assets	23,610,048	24,669,615
Current liabilities:
Accounts payable	400,299	368,082
Accrued expenses and compensation	868,265	589,939
Operating Lease, Liability, Current	148,391	148,391
Total current liabilities	1,416,955	1,106,412
Operating Lease, Liability, Noncurrent	180,345	207,516
Total liabilities	1,597,300	1,313,928
Commitments and contingencies
Stockholders’ equity:
Common Stock, Value, Issued	778	777
Additional paid-in capital	227,100,135	226,934,775
Accumulated deficit	(205,154,040)	(203,579,866)
Total stockholders’ equity	22,012,748	23,355,687
Total liabilities and stockholders’ equity	$ 23,610,048	$ 24,669,615
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares, Issued	7,781,156	7,771,938
Common Stock, Shares, Outstanding	7,781,156	7,771,938
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 65,874	$ 0
Convertible preferred stock
Stockholders’ equity:
Preferred stock	1	1
Preferred Non-Convertible Stock
Stockholders’ equity:
Preferred stock	$ 0	$ 0