Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 1,002,000	$ (301,000)	$ 1,891,000	$ 10,863,000	$ 10,863,000
Reclassification of amounts to income relating to APAC discontinued operations, net of tax	0	183,000	0	(222,000)
Ending balance	1,871,000	69,000	1,871,000	69,000	1,891,000
Accumulated other comprehensive income (loss)	0		0		599,000
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(3,487,000)	(4,666,000)	(4,059,000)	(3,452,000)	(3,452,000)
Ending balance	(3,888,000)	(4,134,000)	(3,888,000)	(4,134,000)	$ (4,059,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive income (loss) due to foreign currency translation, net of tax	$ (401,000)	$ 349,000	$ 171,000	$ (460,000)

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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+ Details