Warrant Derivative Liabilities (Details Textual) - USD ($) shares in Thousands, $ in Thousands		1 Months Ended				3 Months Ended		9 Months Ended
	Jul. 12, 2019	Jan. 27, 2020	Jan. 26, 2020	Oct. 28, 2019	Aug. 22, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Nov. 11, 2019	Mar. 31, 2019
Warrant Derivative Liabilities (Textual)
Change in fair value of derivative liabilities						$ (2,376)	$ 1,587	$ (2,392)	$ 2,623
Shares issued in exchange for warrants, description								The March and August 2018 warrants were exchanged for 4,277 shares of Company common stock and thus were no longer outstanding as of December 31, 2019. The March and May 2017 warrants were exchanged for 2,243 shares of Company common stock in October 2019.
Conversion of stock, description				The Company issued 2,243 shares of the Company's common stock to investors in exchange for the March and May 2017 warrants. Upon the issuance of the 2,243 shares, the March and May 2017 warrants were extinguished. The fair value of the shares issued was $2,186, and the fair value of the warrants was $1,966 resulting in a loss of $220 that was recognized on the exchange.				The Existing Securities have a current exercise price of $0.59, which was amended from $2.50 on July 12, 2019. The current exercise price for the Existing Securities shall be amended to reduce the exercise price to $0.51 on August 21, 2019, subject to adjustment pursuant to the provisions of the Existing Securities.
Number of shares issued	4,277
Number of warrants issued					3,922
Fair value of warrants estimated					$ 1,576	2,812		$ 2,812
Interest expense on warrant derivative liabilities								$ 107
Warrant [Member]
Warrant Derivative Liabilities (Textual)
Shares issued in exchange for warrants, description								On July 12, 2019, the March and August 2018 warrants were exchanged for 4,277 shares of Company common stock, and all of those warrants were extinguished. The fair value of the shares issued was $3,293, and the fair value of the warrants was $2,455 resulting in a loss of $839 that was recognized on the exchange.
Series C Preferred Stock [Member]
Warrant Derivative Liabilities (Textual)
Fair value of warrants estimated						$ 947		$ 947		$ 1,107
Subsequent Event [Member]
Warrant Derivative Liabilities (Textual)
Shares issued in exchange for warrants, description		The Company received approximately $2,000 in cash from the exercise of the warrants and issued the replacement warrants to the investors, which have an exercise price of $0.90 and may be exercised within five years of issuance.
Subsequent Event [Member] | Letter Agreements [Member]
Warrant Derivative Liabilities (Textual)
Shares issued in exchange for warrants, description			The Company entered into letter agreements with accredited institutional investors holding the warrants issued with the Company's Series B Convertible Preferred Stock on August 21, 2019. Pursuant to the agreements, the investors agreed to a cash exercise of 3,921 of the warrants at a price of $0.51 in consideration for the receipt of replacement warrants to purchase 5,882 of the Company's common stock at $0.90.