CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities:
Net income (loss) from operations	$ (4,954,000)	$ 4,911,000
Non-cash charges:
Depreciation and amortization	1,787,000	1,566,000
Amortization of other intangible assets	702,000	703,000
Amortization of operating lease assets	899,000	582,000
Amortization of debt issue costs	16,000	23,000
Amortization of consideration payable to customer	270,000	270,000
Provision for (recovery of) doubtful accounts	24,000	(38,000)
Stock-based compensation	41,000	106,000
Restricted stock-based compensation	41,000	52,000
Loss (gain) on sale of fixed assets	35,000	(7,817,000)
Deferred income taxes	(11,000)	409,000
Gain on contingent consideration settlement	(52,000)	0
Gain on lease obligation settlement	(31,000)	0
Gain on forgiveness of grant obligation	(53,000)	0
Impairment of assets	1,612,000	194,000
Changes in operating assets and liabilities:
Accounts receivable	1,835,000	529,000
Inventories	4,538,000	(1,714,000)
Prepaid expenses and other current assets	(1,341,000)	(339,000)
Other assets	0	(1,000)
Accounts payable	352,000	(1,025,000)
Accrued compensation and benefits	(1,498,000)	(318,000)
Accrued other liabilities	(185,000)	255,000
Operating lease liabilities	(918,000)	(597,000)
Other liabilities	(62,000)	(265,000)
Total adjustments	8,001,000	(7,425,000)
Net cash provided by (used in) operating activities	3,047,000	(2,514,000)
Cash Flows from Investing Activities:
Capital expenditures	(1,104,000)	(1,524,000)
Proceeds from sale real property and other assets	1,000	8,766,000
Purchase of net assets of gear businesses	0	(3,518,000)
Net cash (used in) provided by investing activities	(1,103,000)	3,724,000
Cash Flows from Financing Activities:
Dividend payments	(157,000)	(632,000)
Proceeds from exercise of stock options	18,000	0
Purchase of Class A Common Stock	0	(3,518,000)
Net (payments) proceeds from short-term borrowings	(4,274,000)	3,552,000
Payment of contingent consideration	0	(692,000)
Repayments of notes payable	0	453,000
Payments of debt issue costs	0	(72,000)
Proceeds from Grant	53,000	0
Proceeds from PPP loan	2,929,000	0
Net cash used in financing activities	(1,431,000)	(1,815,000)
Effect of exchange rate changes on cash	11,000	(14,000)
Net increase (decrease) in cash	524,000	(619,000)
Cash at beginning of year	380,000	999,000
Cash at end of year	904,000	380,000
Cash paid for:
Interest	120,000	171,000
Income taxes	35,000	1,809,000
Cash paid for amounts included in the measurement of operating lease liabilities	5,000	30,000
Supplemental disclosures of non-cash investing and financing activities:
Contingent consideration on acquisition of gear businesses	0	64,000
Right of Use ("ROU") assets recognized for new operating lease liabilities	140,000	4,032,000
Operating lease liability related to ROU assets recognized upon adoption of ASC 842	$ 0	$ 418,000