Stockholders Equity (Narrative) (Details) - USD ($)				12 Months Ended
	Mar. 27, 2020	Feb. 12, 2020	Jan. 27, 2020	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Common stock, shares authorized				217,000,000	217,000,000
Proceeds from exercise of warrants				$ 81,000
Proceeds from issuance of common stock				$ 22,893,000	$ 9,975,000
Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Proceeds from issuance of private placement	$ 25,000,000
Securities Purchase Agreement First Tranche [Member]
Class of Stock [Line Items]
Common stock issued in registered public financings (in shares)		993,139
Proceeds from issuance of private placement		$ 2,800,000
Securities Purchase Agreement Second Tranche [Member]
Class of Stock [Line Items]
Common stock issued in registered public financings (in shares)	7,717,661
Proceeds from issuance of private placement	$ 22,200,000
Common Stock [Member]
Class of Stock [Line Items]
Common stock issued in registered public financings (in shares)				8,710,800	1,991,269
Common Stock Subject to Mandatory Redemption [Member] | Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Common stock issued in registered public financings (in shares)	8,710,800		8,710,800
Shares Issued, Price Per Share	$ 2.87		$ 2.87
Warrants and Rights Subject to Mandatory Redemption [Member] | Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Number of shares called by each warrant			1
Exercise price of warrants			$ 2.87
Number of securities called by warrants	8,710,800		8,710,800