Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,138,509	$ (1,751,954)
Other comprehensive income (loss), net of applicable taxes:
Foreign currency translation	(68,854)	(4,921)
Net minimum pension liability	(25,847)	6,763
Total other comprehensive income (loss), net of applicable taxes	(94,701)	1,842
Total comprehensive income (loss)	1,043,808	(1,750,112)
Less: Accrual of Series A redeemable convertible preferred stock dividends	1,083,892	1,157,762
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	552,551	389,811
Total comprehensive income (loss) attributable to common stockholders	$ (592,635)	$ (3,297,685)