BUSINESS AND SUMMARY OF ACCOUNTING POLICIES - Retail automotive industrial and aerospace (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 12,985,000	$ 12,406,000	$ 40,520,000	$ 37,276,000
Florida Pneumatic [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 9,607,000	$ 9,681,000	$ 31,221,000	$ 28,351,000
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Increase (decrease)		$ (74,000)		$ 2,870,000
Percentage of Increase (decrease)		(0.80%)		10.10%
Florida Pneumatic [Member] | Automotive
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 3,168,000	$ 3,530,000	$ 11,053,000	$ 9,690,000
Percentage of revenue	33.00%	36.50%	35.40%	34.20%
Increase (decrease)		$ (362,000)		$ 1,363,000
Percentage of Increase (decrease)		(10.30%)		14.10%
Florida Pneumatic [Member] | Retail
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 3,222,000	$ 3,718,000	$ 10,775,000	$ 9,569,000
Percentage of revenue	33.50%	38.40%	34.50%	33.80%
Increase (decrease)		$ (496,000)		$ 1,206,000
Percentage of Increase (decrease)		(13.30%)		12.60%
Florida Pneumatic [Member] | Aerospace
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 1,832,000	$ 1,268,000	$ 5,094,000	$ 6,341,000
Percentage of revenue	19.10%	13.10%	16.30%	22.40%
Increase (decrease)		$ 564,000		$ (1,247,000)
Percentage of Increase (decrease)		44.50%		(19.70%)
Florida Pneumatic [Member] | Industrial
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 1,257,000	$ 1,044,000	$ 3,919,000	$ 2,383,000
Percentage of revenue	13.10%	10.80%	12.60%	8.40%
Increase (decrease)		$ 213,000		$ 1,536,000
Percentage of Increase (decrease)		20.40%		64.50%
Florida Pneumatic [Member] | Other
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 128,000	$ 121,000	$ 380,000	$ 368,000
Percentage of revenue	1.30%	1.20%	1.20%	1.20%
Increase (decrease)		$ 7,000		$ 12,000
Percentage of Increase (decrease)		5.80%		3.30%
Hy-Tech [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 3,378,000	$ 2,725,000	$ 9,299,000	$ 8,925,000
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Increase (decrease)		$ 653,000	$ 374,000
Percentage of Increase (decrease)		24.00%	4.20%
Hy-Tech [Member] | OEM
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 1,668,000	$ 872,000	$ 4,688,000	$ 3,513,000
Percentage of revenue	49.40%	32.00%	50.40%	39.40%
Increase (decrease)		$ 796,000	$ 1,175,000
Percentage of Increase (decrease)		91.30%	33.40%
Hy-Tech [Member] | ATP
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 751,000	$ 624,000	$ 2,242,000	$ 2,254,000
Percentage of revenue	22.20%	22.90%	24.10%	25.20%
Increase (decrease)		$ 127,000	$ (12,000)
Percentage of Increase (decrease)		20.40%	(0.50%)
Hy-Tech [Member] | PTG
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 882,000	$ 1,027,000	$ 2,132,000	$ 2,783,000
Percentage of revenue	26.10%	37.70%	22.90%	31.20%
Increase (decrease)		$ (145,000)	$ (651,000)
Percentage of Increase (decrease)		(14.10%)	(23.40%)
Hy-Tech [Member] | Other
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 77,000	$ 202,000	$ 237,000	$ 375,000
Percentage of revenue	2.30%	7.40%	2.60%	4.20%
Increase (decrease)		$ (125,000)	$ (138,000)
Percentage of Increase (decrease)		(61.90%)	(36.80%)