Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues	$ 13,744,000	$ 16,278,000	$ 26,822,000	$ 31,518,000
Costs and expenses:
Direct operating (excludes depreciation and amortization shown below)	3,616,000	4,041,000	7,041,000	8,107,000
Selling, general and administrative	6,487,000	6,247,000	13,030,000	12,565,000
Provision for doubtful accounts	1,067,000	949,000	1,132,000	949,000
Depreciation and amortization of property and equipment	2,076,000	3,645,000	4,165,000	8,002,000
Amortization of intangible assets	1,395,000	1,395,000	2,790,000	2,790,000
Total operating expenses	14,641,000	16,277,000	28,158,000	32,413,000
Income (loss) from operations	(897,000)	1,000	(1,336,000)	(895,000)
Interest expense, net	(2,572,000)	(3,975,000)	(5,267,000)	(8,016,000)
Debt conversion expense and loss on extinguishment of notes payable	0	(3,205,000)	0	(3,205,000)
Other expense, net	(18,000)	(133,000)	(28,000)	(202,000)
Change in fair value of interest rate derivatives	0	43,000	0	83,000
Loss from operations before income taxes	(3,487,000)	(7,269,000)	(6,631,000)	(12,235,000)
Income tax expense	0	(196,000)	(139,000)	(382,000)
Net loss	(3,487,000)	(7,465,000)	(6,770,000)	(12,617,000)
Net loss attributable to noncontrolling interest	8,000	11,000	24,000	17,000
Net loss attributable to controlling interests	(3,479,000)	(7,454,000)	(6,746,000)	(12,600,000)
Preferred stock dividends	(89,000)	(89,000)	(178,000)	(178,000)
Net loss attributable to common stockholders	$ (3,568,000)	$ (7,543,000)	$ (6,924,000)	$ (12,778,000)
Net loss per Class A and Class B common stock attributable to common stockholders - basic and diluted:
Net loss attributable to common stockholders (in dollars per share)	$ (0.09)	$ (0.60)	$ (0.18)	$ (1.07)
Weighted average number of Class A and Class B common stock outstanding: basic and diluted (in shares)	37,696,256	12,650,909	37,667,934	11,958,601