Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 4,140,000	$ 5,974,000
Accounts receivable, less allowances of $7,000	1,174,000	900,000
Short-term investments (Note 2)	2,055,000	1,566,000
Inventories, less reserves for obsolescence of $5,028,000, and $4,892,000, respectively (Note 3)	4,773,000	5,261,000
Deferred income taxes	1,922,000	0
Prepaid expenses and other current assets	242,000	173,000
Total current assets	14,306,000	13,874,000
Property and equipment, net	2,972,000	3,055,000
Other assets (Note 4)	186,000	193,000
Total assets	17,464,000	17,122,000
Current liabilities:
Accounts payable	687,000	1,813,000
Accrued liabilities	416,000	924,000
Total current liabilities	1,103,000	2,737,000
Commitments and contingencies (Note 6)
Shareholders' equity:
Preferred stock, $0.001 par value. Authorized 5,000,000 shares; None issued or outstanding	0	0
Additional paid-in capital	11,402,000	11,176,000
Accumulated other comprehensive income	(58,000)	(73,000)
Retained earnings	5,011,000	3,276,000
Total equity	16,361,000	14,385,000
Total liabilities and equity	17,464,000	17,122,000
Common Class A [Member]
Shareholders' equity:
Common Stock, value, issued	5,000	5,000
Common Class B [Member]
Shareholders' equity:
Common Stock, value, issued	$ 1,000	$ 1,000

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

Name:	us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).