Earnings (Loss) Per Common Share - Computation of diluted earnings (loss) per share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	34,354,721	13,017,857	27,999,749	13,017,857
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	3,709,240	60,000	3,709,240	60,000
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	14,971,431	1,797,017	14,965,598	1,797,017
Series A preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	933,333	933,333	0	933,333
Convertible promissory note and interest
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	12,417,909	10,227,507	9,324,911	10,227,507
Contingently issuable shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total	2,322,808		0