Long-Term Debt - Summary of long term debt (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument
Long-term debt, Total	$ 636,000	$ 5,026,000
Less current portion	(255,000)	(276,000)
Long-term debt	381,000	4,750,000
Line of credit payable to a financial institution; Interest rate option of bank prime or Libor plus 2.15% (B)(C)
Debt Instrument
Long-term debt, Total	0	4,250,000
Line of credit - Lease for equipment
Debt Instrument
Long-term debt, Total	602,000	712,000
Equipment financing lease obligations; Interest rate fixed for term of each funding based upon the Lender's lease pricing at time of funding. Interest rate/ factor 1.822758% - 1.869304% at time of funding)(E)
Debt Instrument
Long-term debt, Total	$ 34,000	$ 64,000