Consolidated Balance Sheets (Parenthetical) - USD ($)	6 Months Ended	12 Months Ended
	Sep. 30, 2018	Mar. 31, 2018
Debt Instrument, Unamortized Discount, Current	$ 1,216,000	$ 225,000
Unamortized debt issuance expense	$ 1,151,000	$ 3,352,000
Preferred stock, shares authorized (shares)	15,000,000	15,000,000
Common stock, par value (in dollars per share)	$ 0.001
Treasury stock (in shares)	1,313,836	1,313,836
Series A preferred stock
Preferred stock, shares authorized (shares)	20	20
Preferred stock, dividend rate (percentage)	10.00%	10.00%
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares issued (shares)	7	7
Preferred stock, shares outstanding (shares)	7	7
Preferred stock, liquidation preference	$ 3,648	$ 3,648
Class A common stock
Common stock, shares authorized (shares)	60,000,000	60,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued (shares)	36,383,038	36,261,975
Common stock, shares outstanding (shares)	35,069,202	34,948,139
Secured Debt
Unamortized debt issuance expense	$ 1,825,000	$ 2,140,000