Common and Preferred Stock (Details)							1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Jan. 27, 2021 $ / shares	Nov. 16, 2020 $ / shares shares	Oct. 15, 2018 USD ($) $ / shares shares	Oct. 15, 2018 USD ($) $ / shares shares	Oct. 10, 2018 shares	Sep. 11, 2017 USD ($) D $ / shares shares	Oct. 31, 2018 $ / shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Feb. 28, 2021 shares	Jan. 31, 2021 shares	Jan. 26, 2021	Nov. 15, 2020 $ / shares	Nov. 06, 2020 $ / shares	Nov. 05, 2020 $ / shares	Dec. 31, 2017 USD ($)	Aug. 05, 2016
Proceeds from Issuance or Sale of Equity | $			$ 18,600,000	$ 18,600,000
Stock Issued During Period, Shares, New Issues | shares											78,700,000
Preferred Stock, Par or Stated Value Per Share		$ 0.001						$ 1,000			$ 1,000		$ 1,000
Exercise price per warrant		$ 0.69	$ 1.38	$ 1.38			$ 1.38										$ 1.38	$ 0.69	$ 1.38
Effect of Warrant exercise price adjustment | $													$ 880,000
Percentage of issue of the public offering							120.00%
Common stock issued upon conversion | shares														8,996,768	8,996,768
Preferred Stock, Shares Outstanding | shares								0			0		3,973
Proceeds from Issuance of Common Stock | $											$ 65,960,000	$ 0
Over-Allotment Option [Member]
Stock Issued During Period, Shares, New Issues | shares		2,428,825			2,428,825
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares		2,428,825			2,428,825
Issue of warrants to purchase common stock | shares					1,807,826
Fbr Capital Markets Co [Member]
Brokerage Commission percentage																					3.00%
Series A Preferred Stock [Member]
Preferred Stock Conversion Price Per Share	$ 18.90					$ 0.54
Preferred Stock Redemption Discount | $																				$ 6,900,000
Preferred Stock, Dividend Rate, Percentage						2.00%
Preferred Stock, Convertible, Conversion Price, Increase	18.90
Preferred Stock, Convertible, Conversion Price, Decrease	$ 1.50
Convertible Preferred Stock, Terms of Conversion						(i) a 19.99% blocker provision to comply with NYSE American Listing Rules, (ii) if so elected by the Investor, a 4.99% blocker provision that would prohibit beneficial ownership of more than 4.99% of the outstanding shares of the Company’s common stock or voting power at any time, and (iii) applicable regulatory restrictions.
Debt Instrument, Convertible, Threshold Trading Days | D						20
Debt Instrument, Convertible, Threshold Consecutive Trading Days | D						30
Dividends Payable, Amount Per Share						$ 70.00			$ 0.01	$ 0.01		$ 0.01
Adjustments to Additional Paid in Capital, Stock Split | $						$ 7,875.00
Preferred stock accrued dividends | $								$ 0	$ 63,000		$ 24,000	$ 125,000
Maximum percentage	9.99%															4.99%
Common stock issued upon conversion | shares								9,000,000.0			9,000,000.0
Preferred Stock, Shares Outstanding | shares														120,000	120,000
Estimated fair value of inducement consideration | $											$ 7,400,000
Accretion of Preferred Stock Deemed Dividend | $											$ 7,400,000
percentage of stated dividend rate											2.00%
Series A Preferred Stock [Member] | Private Placement [Member]
Stock Issued During Period, Shares, New Issues | shares						120,000
Preferred Stock, Par or Stated Value Per Share						$ 0.001
Proceeds from Issuance of Convertible Preferred Stock | $						$ 12,000,000
Sale of Stock, Consideration Received Per Transaction | $						$ 100
Series B Preferred Stock [Member]
Stock Issued During Period, Value, Issued for Services | $			$ 1,000	$ 1,000
Preferred Stock, Par or Stated Value Per Share			$ 1,000	$ 1,000
Preferred Stock Conversion Price Per Share			$ 1.15	$ 1.15
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares			13,672,173	13,672,173
Conversion of Stock, Shares Converted | shares			13,672,173	13,672,173				0	1,040		3,973	2,113
Dividends Payable, Amount Per Share									$ 0.03	$ 0.03		$ 0.03
Preferred stock accrued dividends | $								$ 0	$ 392,000		$ 1,497,000	$ 796,000
Accretion of Preferred Stock Deemed Dividend | $									$ 392,000	$ 795,000	$ 1,500,000
Common Class A [Member]
Stock Issued During Period, Shares, New Issues | shares			2,520,000	2,520,000
Shares Issued, Price Per Share			$ 1.15	$ 1.15
Exercise price per warrant			$ 1.38	$ 1.38
Common Class B [Member]
Stock Issued During Period, Shares, New Issues | shares			15,723	15,723
Preferred Stock, Par or Stated Value Per Share			$ 1,000	$ 1,000
Preferred Stock Conversion Price Per Share			$ 1.15	$ 1.15