Subsequent Events (Narrative) (Details)	1 Months Ended
	May 06, 2020	Apr. 30, 2019
$6.24 - $10.24
Subsequent Event, Date	Apr. 01, 2020	Apr. 01, 2020
Subsequent Event, Description	Subsequent to March 31, 2020 and through May 6, 2020, we have issued 11.5 million shares and raised a total of $6.2 million under the Common Stock Purchase Agreement with Lincoln Park.	In April 2020, we received funds in the amount of $1,570,881 pursuant to a loan under the Paycheck Protection Program of the 2020 CARES Act ("PPP") administered by the Small Business Association. The loan has an interest rate of 0.98% and a term of 24 months. No payments are due for the first 6 months, although interest accrues, and monthly payments are due over the next 18 months to retire the loan plus accrued interest. Funds from the loan may only be used for certain purposes, including payroll, benefits, rent and utilities, and a portion of the loan used to pay certain costs may be forgivable, all as provided by the terms of the PPP. The loan is evidenced by a promissory note, which contains customary events of default relating to, among other things, payment defaults and breaches of representations and warranties. We may prepay the loan at any time prior to maturity with no prepayment penalties.