Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 7,030,000	$ 6,652,000
Accounts receivable, less allowances of $7,000	911,000	639,000
Inventories, less reserves for obsolescence of $4,769,000, and $4,759,000, respectively (Note 2)	3,341,000	3,518,000
Prepaid expenses and other current assets	129,000	46,000
Total current assets	11,411,000	10,855,000
Property and equipment, net	3,177,000	3,217,000
Other assets (Note 3)	190,000	189,000
Total assets	14,778,000	14,261,000
Current liabilities:
Accounts payable	814,000	410,000
Accrued liabilities	460,000	446,000
Total current liabilities	1,274,000	856,000
Long-term debt (Note 4)	163,000	163,000
Total liabilities	1,437,000	1,019,000
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	11,079,000	11,071,000
Accumulated other comprehensive income	(79,000)	(66,000)
Retained earnings	2,335,000	2,231,000
Total equity	13,341,000	13,242,000
Total liabilities and equity	14,778,000	14,261,000
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.

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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).