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Stock Options, Restricted Shares and Warrants (Tables)
 12 Months Ended
Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-based compensation
The following amounts of stock-based compensation were recorded (dollars in thousands): 
 
Fiscal Year Ended March 31,
 
2016
 
2015
 
2014
Cost of product revenue
$
36

 
$
50

 
$
70

General and administrative
1,148

 
1,056

 
1,025

Sales and marketing
235

 
360

 
485

Research and development
43

 
33

 
13

 
$
1,462

 
$
1,499

 
$
1,593
Number of shares available for grant
The number of shares available for grant under the plans were as follows:
Available at March 31, 2013
1,632,778

Granted stock options
(305,544
)
Granted shares
(33,641
)
Restricted Shares
(526,663
)
Forfeited restricted shares
69,375

Forfeited stock options
455,691

Available at March 31, 2014
1,291,996

Granted stock options
—

Granted shares
(27,931
)
Restricted Shares
(410,496
)
Forfeited restricted shares
74,957

Forfeited stock options
150,074

Available at March 31, 2015
1,078,600

Granted stock options
—

Granted shares
(64,960
)
Restricted shares
(795,805
)
Forfeited restricted shares
206,471

Forfeited stock options
363,380

Available at March 31, 2016
787,686
Summary of outstanding stock options
The following table summarizes information with respect to outstanding stock options: 
 
Number of
Shares
 
Weighted
Average Exercise
Price
 
Weighted
Average Fair
Value of
Options
Granted
 
Aggregate Intrinsic
Value
Outstanding at March 31, 2013
3,312,523

 
$
3.42

 
1.23

 
 
Granted
305,544

 
$
1.98

 
 
 
 
Exercised
(446,059
)
 
$
2.25

 
 
 
 
Forfeited
(455,691
)
 
$
3.26

 
 
 
 
Outstanding at March 31, 2014
2,716,317

 
$
3.43

 
1.32

 
 
Granted
—

 
$
—

 
 
 
 
Exercised
(139,407
)
 
$
2.46

 
 
 
 
Forfeited
(150,074
)
 
$
3.13

 
 
 
 
Outstanding at March 31, 2015
2,426,836

 
$
3.50

 
—

 
 
Granted
—

 
$
—

 
 
 
 
Exercised
(46,410
)
 
$
2.09

 
 
 
 
Forfeited
(363,380
)
 
$
4.68

 
 
 
 
Outstanding at March 31, 2016
2,017,046

 
$
3.32

 
—

 
$
—

Exercisable at March 31, 2016
1,811,146

 
 
 
 
 
$
—
Schedule of range of exercise prices
The following table summarizes the range of exercise prices on outstanding stock options at March 31, 2016: 
 
March 31, 2016
 
Outstanding
 
Weighted Average Remaining Contractual Life (Years)
 
Weighted Average Exercise Price
 
Vested
 
Weighted Average Exercise Price
$1.62 - 2.20
684,476

 
4.93
 
$1.98
 
558,776

 
$1.98
$2.41 - 2.75
373,144

 
6.24
 
2.45
 
360,744

 
2.44
$2.86 - 4.28
719,971

 
4.07
 
3.41
 
652,171

 
3.44
$4.49 - 4.76
25,400

 
2.40
 
4.64
 
25,400

 
4.64
$5.35 - 5.44
77,204

 
3.03
 
5.39
 
77,204

 
5.39
$9.00
27,000

 
1.87
 
9.00
 
27,000

 
9.00
$10.14 - 11.61
109,851

 
1.66
 
10.87
 
109,851

 
10.87
 
2,017,046

 
4.54
 
$3.32
 
1,811,146

 
$3.43
Summary of restricted shares granted
During fiscal 2016, Orion granted restricted shares as follows (which are included in the above stock plan activity tables):
Balance at March 31, 2015
704,688

Shares issued
795,805

Shares vested
(240,633
)
Shares forfeited
(206,471
)
Shares outstanding at March 31, 2016
1,053,389

Per share price on grant date
$1.34-2.62

Compensation expense
$
1,306,191
Schedule of unrecognized compensation cost related to non-vested awards
Unrecognized compensation cost related to non-vested common stock-based compensation as of March 31, 2016 is as follows (dollars in thousands): 
Fiscal 2017
$
1,113

Fiscal 2018
771

Fiscal 2019
274

Fiscal 2020
72

Fiscal 2021
12

Thereafter
—

 
$
2,242

Remaining weighted average expected term
2.6 years
Warrants outstanding rollforward
A summary of warrant activity is as follows:
 
Number of
Shares
 
Weighted
Average
Exercise Price
Outstanding at March 31, 2013
38,980

 
$
2.25

Issued
—

 
—

Exercised
—

 
$
—

Cancelled
—

 
$
—

Outstanding at March 31, 2014
38,980

 
$
2.25

Issued
—

 
—

Exercised
(38,980
)
 
2.25

Cancelled
—

 
—

Outstanding at March 31, 2015 and March 31,2016
—

 
$
—