Consolidated Balance Sheets (Parenthetical) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2018
Unamortized debt issuance cost	$ 3,989,000	$ 5,340,000
Preferred stock, shares authorized (in shares)	15,000,000	15,000,000
Series A preferred stock
Preferred stock, shares authorized (in 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 (in shares)	7	7
Preferred stock, shares outstanding (in shares)	7	7
Preferred stock, liquidation preference	$ 3,648	$ 3,648
Class A common stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	21,000,000	25,000,000
Common stock, shares issued (in shares)	7,977,861	11,841,983
Common stock, shares outstanding (in shares)	7,700,617	11,841,983
Treasury stock, Class A shares (in shares)	277,244	0
Class B common stock
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,241,000	1,241,000
Common stock, shares issued (in shares)	1,241,000	1,241,000
Common stock, shares outstanding (in shares)	0	0
Secured Debt [Member]
Unamortized debt issuance cost	$ 4,577,000	$ 2,701,000