Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2019 ₩ / shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2018 ₩ / shares
Current assets:
Accounts receivables, allowance for doubtful accounts | $	$ 674,129		$ 725,389
Stockholders' Equity
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001		$ 0.0001
Common stock, shares authorized (in shares)	100,000,000		100,000,000
Common stock, shares issued (in shares)	35,030,339		35,030,339
Common stock, shares outstanding (in shares)	35,030,339		35,030,339
Preferred stock, par value (in dollars per share) | (per share)	$ 0.4380	₩ 500	$ 0.4380	₩ 500
Preferred stock, shares authorized (in shares)	2,000,000		2,000,000
Preferred stock, issued (in shares)	157,142		0
Preferred stock, outstanding (in shares)	157,142		0