Stockholders' Equity - Options Outstanding and Exercisable (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
OPTIONS OUTSTANDING
Number of Shares Outstanding (in shares) | shares	777,153
Weighted Average Remaining Contractual Life (in years)	6 years 10 months 10 days
Weighted Average Exercise Price (in dollars per share)	$ 1.04
OPTIONS EXERCISABLE
Number of Shares Exercisable (in shares) | shares	111,595
Weighted Average Remaining Contractual Life (in years)	6 years
Weighted Average Exercise Price (in dollars per share)	$ 4.61
Exercise price, range one
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	0.42
Range of Exercise Prices, upper limit (in dollars per share)	$ 0.45
OPTIONS OUTSTANDING
Number of Shares Outstanding (in shares) | shares	450,000
Weighted Average Remaining Contractual Life (in years)	9 years 5 months 20 days
Weighted Average Exercise Price (in dollars per share)	$ 0.42
OPTIONS EXERCISABLE
Number of Shares Exercisable (in shares) | shares	0
Weighted Average Exercise Price (in dollars per share)	$ 0.00
Exercise price, range two
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	0.46
Range of Exercise Prices, upper limit (in dollars per share)	$ 1.81
OPTIONS OUTSTANDING
Number of Shares Outstanding (in shares) | shares	213,800
Weighted Average Remaining Contractual Life (in years)	1 year 10 months 20 days
Weighted Average Exercise Price (in dollars per share)	$ 0.48
OPTIONS EXERCISABLE
Number of Shares Exercisable (in shares) | shares	0
Weighted Average Exercise Price (in dollars per share)	$ 0.00
Exercise price, range three
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	1.82
Range of Exercise Prices, upper limit (in dollars per share)	$ 3.76
OPTIONS OUTSTANDING
Number of Shares Outstanding (in shares) | shares	72,603
Weighted Average Remaining Contractual Life (in years)	7 years 2 months
Weighted Average Exercise Price (in dollars per share)	$ 3.34
OPTIONS EXERCISABLE
Number of Shares Exercisable (in shares) | shares	70,845
Weighted Average Remaining Contractual Life (in years)	7 years 2 months
Weighted Average Exercise Price (in dollars per share)	$ 3.35
Exercise price, range four
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	3.77
Range of Exercise Prices, upper limit (in dollars per share)	$ 10.70
OPTIONS OUTSTANDING
Number of Shares Outstanding (in shares) | shares	40,750
Weighted Average Remaining Contractual Life (in years)	4 years 1 month
Weighted Average Exercise Price (in dollars per share)	$ 6.80
OPTIONS EXERCISABLE
Number of Shares Exercisable (in shares) | shares	40,750
Weighted Average Remaining Contractual Life (in years)	4 years 1 month
Weighted Average Exercise Price (in dollars per share)	$ 6.80