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DEBT (Tables)
 9 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Information related to availability on Credit Agreement
Information related to availability on our Credit Agreement is as follows:
 
December 31, 2017
 
March 31, 2017
Available borrowings
$
98,325

 
$
98,320

Outstanding letters of credit
1,664

 
1,664
Convertible Debt
The following table provides additional information related to our 1.00% Convertible Notes:
 
December 31, 2017
 
March 31, 2017
Additional paid-in capital
$
35,784

 
$
35,784

Principal amount of 1.00% Convertible Notes
$
14,163

 
$
268,149

Unamortized discount of the liability component
311

 
15,751

Carrying amount of debt issuance costs
14

 
469

Net carrying amount of 1.00% Convertible Notes
$
13,838

 
$
251,929
Schedule of Components of Interest Expense Related to Convertible Debt
The following table provides the components of interest expense related to our 1.00% Convertible Notes:
 
Three Months Ended December 31,
 
Nine Months Ended December 31,
 
2017
 
2016
 
2017
 
2016
Cash interest expense (coupon interest expense)
$
(60
)
 
$
698

 
$
519

 
$
2,115

Non-cash amortization of discount on 1.00% Convertible Notes
1,509

 
3,285

 
15,424

 
10,289

Amortization of debt issuance costs
48

 
99

 
471

 
333

Total interest expense related to 1.00% Convertible Notes
$
1,497

 
$
4,082

 
$
16,414

 
$
12,737