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STOCK BASED COMPENSATION (Tables) | 12 Months Ended
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Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-based compensation expense | The following table shows total stock-based compensation expense included in the Consolidated Statements of Operations and Comprehensive Income for fiscal 2014, 2013 and 2012 (in thousands):
| Years Ended Years Ended June 30,
| 2014 |  | 2013 |  | 2012
Cost of sales | $ | 590 |  |  | $ | 446 |  |  | $ | 117 |
Research and development | 2,423 |  |  | 1,433 |  |  | 542 |
Sales, general and administrative | 1,893 |  |  | 1,497 |  |  | 834 |
| $ | 4,906 |  |  | $ | 3,376 |  |  | $ | 1,493 |
Option activity for Company's stock incentive plans | The following is a summary of option activity for the Company’s stock incentive plans for fiscal 2014, 2013 and 2012:
| Common Stock Options Outstanding
| Number of Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value
|  |  |  |  |  |  | (In thousands)
Balance, June 30, 2011 | 6,171,707 |  |  | $ | 0.72 |  |  | 6.44 |  | $ | 43,135 |
Granted | 161,000 |  |  | 10.44 |  |  |  |  |
Exercised | (2,885,470 | ) |  | 0.28 |  |  |  |  |
Forfeitures and cancellations | (99,792 | ) |  | 4.71 |  |  |  |  |
Balance, June 30, 2012 | 3,347,445 |  |  | $ | 1.45 |  |  | 6.62 |  | $ | 42,920 |
Granted | 683,500 |  |  | 11.29 |  |  |  |  |
Exercised | (266,558 | ) |  | 2.39 |  |  |  |  |
Forfeitures and cancellations | (150,125 | ) |  | 5.68 |  |  |  |  |
Balance, June 30, 2013 | 3,614,262 |  |  | $ | 3.07 |  |  | 6.17 |  | $ | 52,330 |
Exercised | (849,635 | ) |  | 2.46 |  |  |  |  |
Forfeitures and cancellations | (107,485 | ) |  | 10.55 |  |  |  |  |
Balance, June 30, 2014 | 2,657,142 |  |  | $ | 2.96 |  |  | 5.11 |  | $ | 112,215 |
Vested and expected to vest as of June 30, 2014 | 2,635,599 |  |  | $ | 2.89 |  |  | 5.09 |  | $ | 111,482 |
Vested and exercisable as of June 30, 2014 | 2,233,533 |  |  | $ | 1.60 |  |  | 4.56 |  | $ | 97,363 |
Stock options outstanding by exercise price range | Additional information regarding options outstanding as of June 30, 2014 is as follows (in thousands, except weighted average exercise price amounts and contractual life):
|  | Options Outstanding |  |  |  | Options Exercisable
Range of Exercise Prices |  | Number of Options |  | Weighted Average Remaining Contractual Life (Years) |  | Weighted Average Exercise Price |  | Number of Options |  | Weighted Average Exercise Price
$0.01 - $0.04 |  | 75,270 |  |  | 3.17 |  | $ | 0.01 |  |  | 75,270 |  |  | $ | 0.01 |
$0.05 - $0.39 |  | 1,594,890 |  |  | 3.78 |  | 0.05 |  |  | 1,594,890 |  |  | 0.05 |
$0.40 - $5.11 |  | 370,220 |  |  | 6.28 |  | 3.07 |  |  | 319,027 |  |  | 2.99 |
$5.12 - $10.76 |  | 124,817 |  |  | 6.98 |  | 6.95 |  |  | 74,886 |  |  | 7.00 |
$10.77 - $11.74 |  | 321,500 |  |  | 8.37 |  | 10.77 |  |  | 107,537 |  |  | 10.77 |
$11.75 - $18.48 |  | 163,267 |  |  | 8.41 |  | 13.30 |  |  | 58,105 |  |  | 13.36 |
$18.49 - $18.70 |  | 2,907 |  |  | 7.51 |  | 18.49 |  |  | 1,406 |  |  | 18.49 |
$18.71 - $19.98 |  | 1,000 |  |  | 7.36 |  | 18.71 |  |  | 645 |  |  | 18.71 |
$19.99 - $26.28 |  | 3,271 |  |  | 7.48 |  | 21.43 |  |  | 1,767 |  |  | 21.17 |
$0.01 – $26.28 |  | 2,657,142 |  |  | 5.11 |  | $ | 2.96 |  |  | 2,233,533 |  |  | $ | 1.60 |
Fair value of employee stock options | For fiscal 2013 and 2012 the fair value of employee stock options was estimated using the following weighted average assumptions:
| Years Ended Years Ended June 30,
| 2013 |  | 2012
Expected term | 6.1 years |  |  | 6.1 years |
Expected volatility | 52 | % |  | 49 | %
Risk-free interest rate | 0.9 | % |  | 1.6 | %
Expected dividend yield | — |  |  | — |
Weighted average grant date fair value | $ | 5.57 |  |  | $ | 5.05 |
Activity of RSUs | The following table summarizes the activity of the RSUs made by the Company:
| Number of Shares |  | Weighted Average Grant Date Fair Value
Non-vested RSUs, June 30, 2011 | 488,385 |  |  | $ | 2.66 |
RSUs granted | 169,710 |  |  | 22.33 |
RSUs vested | (146,475 | ) |  | 2.37 |
RSUs canceled | (58,000 | ) |  | 8.04 |
Non-vested RSUs, June 30, 2012 | 453,620 |  |  | $ | 9.42 |
RSUs granted | 656,500 |  |  | 14.11 |
RSUs vested | (70,512 | ) |  | 14.14 |
RSUs canceled | (294,702 | ) |  | 5.29 |
Non-vested RSUs, June 30, 2013 | 744,906 |  |  | $ | 14.74 |
RSUs granted | 209,032 |  |  | 37.87 |
RSUs vested | (170,197 | ) |  | 15.59 |
RSUs canceled | (234,039 | ) |  | 16.18 |
Non-vested RSUs, June 30, 2014 | 549,702 |  |  | $ | 22.65 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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