Income Taxes - Components of Deferred Income Tax (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Long-term deferred income tax assets (liabilities), net:
Bad debt	$ 387,000	$ 417,000
Warranty	1,426,000	1,280,000
Other accrued expenses and reserves	484,000	1,709,000
Inventory	3,624,000	3,797,000
Goodwill and intangibles	(19,910,000)	(24,291,000)
Convertible debt	5,193,000	2,623,000
Fixed assets	(24,026,000)	(13,582,000)
Compensation and benefits	4,271,000	6,349,000
Loss and credit carryforwards	127,397,000	118,290,000
Product liability	1,596,000	1,797,000
State and local taxes	34,794,000	32,835,000
Valuation allowances	(176,230,000)	(163,298,000)
Deferred Tax Liabilities, Leasing Arrangements	19,649,000	9,258,000
Other, net	1,221,000	1,630,000
Net Deferred Income Taxes	$ 20,124,000	$ 21,186,000