Business and Basis of Presentation (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Jan. 01, 2023	Dec. 31, 2021
Organization And Basis Of Presentation [Line Items]
Accounts receivable, net	$ 576,281		$ 646,771
Net proceeds from issuance of stock and warrants	0	$ 1,943,052
Accumulated deficit	205,154,040		203,579,866
Cash and cash equivalents	2,376,619		4,335,020
Prepaid expenses and other current assets	(508,391)		(645,502)
Assets, Current	(23,086,169)		(24,106,987)
Liabilities, Current	(1,416,955)		(1,106,412)
Operating Lease, Liability, Noncurrent	(180,345)		(207,516)
Stockholders' Equity Attributable to Parent	22,012,748	24,237,908	23,355,687		$ 23,215,786
Cost of revenues	526,372	508,874
Gross Profit	1,198,399	1,793,517
Operating Lease, Right-of-Use Asset	(342,082)		(370,609)
Assets	(23,610,048)		(24,669,615)
Accrued Liabilities, Current	(868,265)		(589,939)
Liabilities	(1,597,300)		(1,313,928)
Allowance for doubtful accounts	25,000		$ 25,000
Other Comprehensive Income (Loss), Net of Tax		0
Cash, Cash Equivalents, and Short-Term Investments	20,300,000
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	65,874	0
Net Income (Loss) Attributable to Parent	1,574,174	$ 958,562
Money Market Funds | From Held To Maturity Securities
Organization And Basis Of Presentation [Line Items]
Cash and cash equivalents	$ 81,751
Accounting Standards Update 2016-13
Organization And Basis Of Presentation [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date				Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]				true
Three Customers [Member] | Accounts Receivable | Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage			55.00%
Two Customers | Revenue | Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	39.00%	43.00%
Two Customers | Accounts Receivable | Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	60.00%