BUSINESS AND SUMMARY OF ACCOUNTING POLICIES - Retail automotive industrial and aerospace (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 13,945,000	$ 13,350,000
Florida Pneumatic [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 10,901,000	$ 10,030,000
Percentage of revenue	100.00%	100.00%
Increase (decrease)		$ 871,000
Percentage of Increase (decrease)		8.70%
Florida Pneumatic [Member] | Automotive
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 4,102,000	$ 3,232,000
Percentage of revenue	37.60%	32.20%
Increase (decrease)		$ 870,000
Percentage of Increase (decrease)		26.90%
Florida Pneumatic [Member] | Retail
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 3,790,000	$ 2,990,000
Percentage of revenue	34.80%	29.80%
Increase (decrease)		$ 800,000
Percentage of Increase (decrease)		26.80%
Florida Pneumatic [Member] | Aerospace
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 1,528,000	$ 2,599,000
Percentage of revenue	14.00%	25.90%
Increase (decrease)		$ (1,071,000)
Percentage of Increase (decrease)		(41.20%)
Florida Pneumatic [Member] | Industrial
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 1,359,000	$ 1,062,000
Percentage of revenue	12.50%	10.60%
Increase (decrease)		$ 297,000
Percentage of Increase (decrease)		28.00%
Florida Pneumatic [Member] | Other
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 122,000	$ 147,000
Percentage of revenue	1.10%	1.50%
Increase (decrease)		$ (25,000)
Percentage of Increase (decrease)		(17.00%)
Hy-Tech [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 3,044,000	$ 3,320,000
Percentage of revenue	100.00%	100.00%
Increase (decrease)		$ (276,000)
Percentage of Increase (decrease)		(8.30%)
Hy-Tech [Member] | OEM
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 1,611,000	$ 1,439,000
Percentage of revenue	52.90%	43.30%
Increase (decrease)		$ 172,000
Percentage of Increase (decrease)		12.00%
Hy-Tech [Member] | ATP
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 713,000	$ 1,061,000
Percentage of revenue	23.40%	32.00%
Increase (decrease)		$ (348,000)
Percentage of Increase (decrease)		(32.80%)
Hy-Tech [Member] | PTG
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 646,000	$ 735,000
Percentage of revenue	21.20%	22.10%
Increase (decrease)		$ (89,000)
Percentage of Increase (decrease)		(12.10%)
Hy-Tech [Member] | Other
Schedule Of Summary Of Accounting Policies [Line Items]
Revenues	$ 74,000	$ 85,000
Percentage of revenue	2.50%	2.60%
Increase (decrease)		$ (11,000)
Percentage of Increase (decrease)		(12.90%)