Business and Basis of Presentation (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020
Organization And Basis Of Presentation [Line Items]
Accounts receivable, net	$ 547,775		$ 547,775		$ 310,818
Net proceeds from issuance of stock and warrants			1,950,881	$ 3,789,995
Accumulated deficit	201,281,742		201,281,742		199,163,257
Cash and cash equivalents	6,002,329		6,002,329		22,572,104
Prepaid expenses and other current assets	(241,651)		(241,651)		(598,384)
Assets, Current	(24,626,950)		(24,626,950)		(24,187,859)
Accrued Sales Return provisions	8,000		8,000		39,000
Liabilities, Current	(1,587,570)		(1,587,570)		(1,365,697)
Operating Lease, Liability, Noncurrent	(258,912)		(258,912)		(306,709)
Stockholders' Equity Attributable to Parent	23,410,571	$ 8,835,129	23,410,571	8,835,129	23,215,786	$ 24,237,908	$ 5,261,052	$ 5,247,775
Cost of revenues	686,121	558,221	1,194,995	1,134,510
Gross Profit	1,452,180	1,655,278	3,245,697	3,234,461
Compensation cost not yet recognized	1,183,449		1,183,449
Operating Lease, Right-of-Use Asset	(424,720)		(424,720)		(475,230)
Assets	(25,257,053)		(25,257,053)		(24,888,192)
Accrued Liabilities, Current	(1,030,607)		(1,030,607)		(814,155)
Liabilities	(1,846,482)		(1,846,482)		(1,672,406)
Allowance for doubtful accounts	25,000		25,000		$ 25,000
Other Comprehensive Income (Loss), Net of Tax	0	$ 0	0	0
IdleFacilityImpairmentCharge			0	$ 126,748
Cash, Cash Equivalents, and Short-term Investments	23,000,000		23,000,000
Debt Securities, Held-to-maturity, Fair Value	$ 16,796,840		$ 16,796,840
One Customer | Revenue | Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	34.00%	26.00%	39.00%	31.00%
One Customer | Accounts Receivable | Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage			40.00%
Two Customers | Accounts Receivable | Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage					35.00%