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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Mar. 31, 2018
Accounting Policies [Abstract]  
Schedule of Cost and Accumulated Depreciation of Property and Equipment
The Company accounts for depreciation and amortization using the straight-line method to allocate the cost of property, plant and equipment over their estimated useful lives as follows:
 
Asset Classification
 
Estimated Useful Life in Years
Building
 
40
Process upgrades to the building
 
10-40
Machinery and equipment
 
3-10
Furniture and fixtures
 
3-5
Leasehold improvements
 
Shorter of the estimated useful life or the remaining lease term
The cost and accumulated depreciation of property and equipment at March 31, 2018 and 2017 are as follows (in thousands):
 
March 31,
2018
 
March 31,
2017
Land
$
—

 
$
3,643

Construction in progress - equipment
654

 
601

Buildings
—

 
34,549

Equipment and software
72,760

 
73,445

Furniture and fixtures
1,878

 
1,201

Leasehold improvements
1,426

 
2,442

Property, plant and equipment, gross
76,718

 
115,881

Less accumulated depreciation
(64,205
)
 
(72,443
)
Property, plant and equipment, net
$
12,513

 
$
43,438
Schedule of Reconciliation of Numerator and Denominator for Earnings Per Share
The following table reconciles the numerators and denominators of the EPS calculation for the fiscal years ended March 31, 2018, 2017, and 2016 (in thousands except per share amounts):
 
 
Fiscal year ended March 31,
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net loss
$
(32,776
)
 
$
(27,373
)
 
$
(23,139
)
Denominator:
 
 
 
 
 
Weighted-average shares of common stock outstanding
19,621

 
14,231

 
13,295

Weighted-average shares subject to repurchase
(654
)
 
(427
)
 
(117
)
Shares used in per-share calculation ― basic
18,967

 
13,804

 
13,178

Shares used in per-share calculation ― diluted
18,967

 
13,804

 
13,178

Net loss per share ― basic
$
(1.73
)
 
$
(1.98
)
 
$
(1.76
)
Net loss per share ― diluted
$
(1.73
)
 
$
(1.98
)
 
$
(1.76
)