Accrued Core Payment (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016
Accrued Core Payment [Abstract]
2018	$ 12,185,000
2019	10,821,000
2020	1,410,000
2021	354,000
Total accrued core payments	24,770,000
Less amount representing interest	(707,000)
Present value of accrued core payments	24,063,000	$ 26,539,000
Less current portion of accrued core payments	(11,714,000)	(8,989,000)
Long-term portion of accrued core payments	$ 12,349,000	$ 17,550,000