CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities
Net income	$ 4,911,000	$ 856,000
Non-cash charges:
Depreciation and amortization	1,566,000	1,383,000
Amortization of other intangible assets	703,000	702,000
Amortization of operating leased assets	582,000	0
Amortization of debt issue costs	23,000	95,000
Amortization of consideration payable to customer	270,000	122,000
(Recovery) provision for doubtful accounts	(38,000)	121,000
Stock-based compensation	106,000	196,000
Restricted stock-based compensation	52,000	45,000
Gain on sale of fixed assets	(7,817,000)	(1,000)
Deferred income taxes	409,000	253,000
Impairment of assets	194,000	0
Fair value increase in contingent consideration	0	150,000
Changes in operating assets and liabilities:
Accounts receivable	529,000	482,000
Inventories	(1,714,000)	(901,000)
Prepaid expenses and other current assets	(339,000)	83,000
Other assets	(1,000)	(988,000)
Accounts payable	(1,025,000)	317,000
Accrued compensation and benefits	(318,000)	395,000
Accrued other liabilities	255,000	(324,000)
Operating lease liabilities	(597,000)	0
Other liabilities	(265,000)	(20,000)
Total adjustments	(7,425,000)	2,110,000
Net cash (used in) provided by operating activities	(2,514,000)	2,966,000
Cash Flows from Investing Activities:
Capital expenditures	(1,524,000)	(1,878,000)
Proceeds from sale real property and other assets	8,766,000	26,000
Purchase of net assets of gear businesses	(3,518,000)	0
Net cash provided by (used in) investing activities	3,724,000	(1,852,000)
Cash Flows from Financing Activities:
Dividend payments	(632,000)	(723,000)
Proceeds from exercise of stock options	0	806,000
Purchase of Class A common stock	(3,518,000)	(1,516,000)
Net proceeds from short-term borrowings	3,552,000	168,000
Payment of contingent consideration	(692,000)	0
Repayments of notes payable	(453,000)	(47,000)
Payments of debt issue costs	(72,000)	(3,000)
Net cash used in financing activities	(1,815,000)	(1,315,000)
Effect of exchange rate changes on cash	(14,000)	(41,000)
Net decrease in cash	(619,000)	(242,000)
Cash at beginning of year	999,000	1,241,000
Cash at end of year	380,000	999,000
Supplemental disclosures of cash flow information:
Interest	171,000	130,000
Income taxes	1,809,000	86,000
Amounts included in the measurement of operating lease liabilities	30,000	0
Noncash information:
Contingent consideration on acquisition of gear businesses	64,000	0
Capital expenditures financed	0	400,000
Right of Use ("ROU") assets recognized for new operating lease liabilities	4,032,000	0
Operating lease liability related to ROU assets recognized upon adoption of ASC 842	$ 418,000	$ 0