Stockholders' Equity - Stock Options and a Summary of Activity (Details)	6 Months Ended
	Jun. 30, 2020 $ / shares shares
Stockholders' Equity Note [Abstract]
Fair value of options issued (in dollars per share)	$ 1.18
Exercise price (in dollars per share)	$ 1.55
Expected life of options (in years)	6 years 2 months 12 days
Risk-free interest rate	0.80%
Expected volatility	92.90%
Dividend yield	0.00%
Number of Options*
Outstanding at beginning of period (in shares) | shares	155,031
Granted (in shares) | shares	89,400
Canceled/forfeited (in shares) | shares	(16,921)
Outstanding at end of period (in shares) | shares	227,510
Vested and expected to vest at period end (in shares) | shares	174,271
Exercisable at period end (in shares) | shares	12,370
Weighted Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 5.23
Granted (in dollars per share)	1.55
Canceled/forfeited (in dollars per share)	11.34
Outstanding at end of period (in dollars per share)	3.33
Vested and expected to vest at period end (in dollars per share)	3.77
Exercisable at period end (in dollars per share)	$ 27.75
Weighted Average Remaining Contractual Life (in years)
Outstanding at end of period	7 years 9 months 18 days
Vested and expected to vest at period end	7 years 9 months 18 days
Exercisable at period end	4 years 7 months 6 days