Subsequent Events (Details) - Subsequent Event - Aspire $ / shares in Units, $ in Millions			1 Months Ended
	Nov. 13, 2019 shares	Oct. 21, 2019 shares	Oct. 31, 2019 USD ($) item $ / shares shares
Subsequent Event
Maximum amount committed to be purchased | $			$ 20.0
Term over which the purchase can be made			30 months
Threshold triggering closing price per share to issue purchase notice | $ / shares			$ 0.25
Maximum number of shares that can be purchased under purchase notice			50,000
Number of lowest closing sales price | item			3
Number of consecutive business days immediately preceding the purchase date			10 days
Maximum shares sold per business day			2,000,000
Volume-weighted average price notice, percentage of companys common stock			30.00%
Purchase price as a percentage of volume-weighted average price			97.00%
Maximum number of shares sold		2,626,165
Commitment fee percentage		19.99%
Number of commitment shares purchased	50,000
Number of commitment shares issued			104,167
Commitment fee | $			$ 0.6
Other transaction costs | $			$ 0.1