Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (906,714)	$ 1,052,401
Other comprehensive income (loss), net of applicable taxes:
Foreign currency translation	59,035	(114,552)
Net minimum pension liability	4,706	(6,578)
Total comprehensive income (loss), net of applicable taxes	63,741	(121,130)
Total comprehensive income (loss)	(842,973)	931,271
Less: Accrual of Series A redeemable convertible preferred stock dividends	1,035,977	873,043
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	254,212	0
Less: Deemed dividend on Series A redeemable convertible preferred stock	2,269,042	0
Total comprehensive income (loss) attributable to common stockholders	$ (4,402,204)	$ 58,228