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Stock-Based Compensation | 9 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The Company accounts for its stock-based compensation at fair value. The following table summarizes stock-based compensation expense by financial statement line item for the three and nine months ended December 31, 2018 and 2017 (in thousands):
| Three months ended December 31, |  | Nine months ended December 31,
| 2018 |  | 2017 |  | 2018 |  | 2017
Cost of revenues | $ | 42 |  |  | $ | 39 |  |  | $ | 132 |  |  | $ | 98 |
Research and development | 168 |  |  | 184 |  |  | 289 |  |  | 294 |
Selling, general and administrative | 582 |  |  | 660 |  |  | 1,981 |  |  | 1,723 |
Total | $ | 792 |  |  | $ | 883 |  |  | $ | 2,402 |  |  | $ | 2,115 |
The Company issued 47,075 shares of immediately vested common stock and 463,000 shares of restricted stock awards during the nine months ended December 31, 2018, and issued 37,140 shares of immediately vested common stock and 800,500 shares of restricted stock awards during the nine months ended December 31, 2017. These restricted stock awards generally vest over 2-3 years. Awards for restricted stock include both time-based and performance-based awards. For options and restricted stock awards that vest upon the passage of time, expense is being recorded over the vesting period. Performance-based awards are expensed over the requisite service period based on probability of achievement. In addition, the Company issued 16,667 restricted stock units under the 2007 Stock Incentive Plan during the nine months ended December 31, 2017, each of which represents the right to receive one share of common stock in connection with a severance agreement entered into with one of the Company's former executive officers. These restricted stock units vested and were settled in shares of common stock on the eighth day after receipt of an irrevocable release. The estimated fair value of the Company’s stock-based awards, less expected annual forfeitures, is amortized over the awards’ service period. The total unrecognized compensation cost for unvested outstanding stock options was $0.1 million at December 31, 2018. This expense will be recognized over a weighted average expense period of approximately 0.3 years. The total unrecognized compensation cost for unvested outstanding restricted stock was $3.3 million at December 31, 2018. This expense will be recognized over a weighted-average expense period of approximately 1.8 years. The Company did not grant any stock options during the three and nine months ended December 31, 2018 or 2017.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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