SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Carrying Value and Fair Value of Financial Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Carrying Value	$ 135,709
Convertible subordinated debt
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Carrying Value	69,253	$ 152,138
Long-term debt
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Carrying Value	65,709	0
Level 2 fair value measurement | Convertible subordinated debt
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value	51,686	166,551
Level 2 fair value measurement | Long-term debt
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair Value	$ 65,741	$ 0