Subsequent Events (Details) - Subsequent Event	Mar. 13, 2019 USD ($) $ / shares shares
Subsequent Event [Line Items]
Number of shares sold (in shares) | shares	250,000
Price of shares sold (in dollars per share) | $ / shares	$ 4.00
Gross price for stock transaction	$ 1,000,000
Lincoln Park
Subsequent Event [Line Items]
Aggregate offering amount authorized per registration rights agreement	$ 26,000,000
Shares issued as consideration per agreement (in shares) | shares	181,510
Term of registration rights agreement (in months)	36 months
Remaining authorized amount available per agreement	$ 25,000,000
Number of shares allowable to direct for Regular Purchase (in shares) | shares	100,000
Maximum obligation per directed purchase transaction for Regular Purchase	$ 2,500,000
Maximum shares allowed in Accelerated Purchase as percent of shares in Regular Purchase (percent)	300.00%
Maximum shares allowed in Accelerated Purchase as percent of shares traded during specified period (percent)	30.00%
Maximum beneficial ownership allowable per registration rights agreement	9.99%