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Stockholders' Equity | 3 Months Ended
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Sep. 30, 2019
Stockholders' Equity |
Stockholders' Equity | 7. Stockholders’ Equity ​ Stock-based Compensation ​ As of September 30, 2019, we maintained the Amended and Restated 2012 Incentive Award Plan (the "2012 Plan ") and the Amended and Restated 2006 Equity Participation Plan ("2006 Plan") as stock-based employee compensation plans. No further grants may be made under the 2006 Plan. The 2012 Plan and the 2006 Plan are collectively referred to as the "OSI Plans." ​ We recorded stock-based compensation expense in the consolidated statement of operations as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​
​ |  | 2018 |  | 2019 | ​
Cost of goods sold | ​ | $ | 207 | ​ | $ | 171 | ​
Selling, general and administrative | ​ |  | 5,111 | ​ |  | 6,085 | ​
Research and development | ​ |  | 145 | ​ |  | 160 | ​
Stock-based compensation expense | ​ | $ | 5,463 | ​ | $ | 6,416 | ​
​ As of September 30, 2019, total unrecognized compensation cost related to share-based compensation grants under the OSI Plans were estimated at $0.4 million for stock options and $28.2 million for RSUs. We expect to recognize these costs over a weighted average period of 1.7 years with respect to the stock options and 1.7 years for grants of RSUs. ​ The following summarizes stock option activity during the three months ended September 30, 2019: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average | ​ | Weighted-Average | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | Remaining Contractual | ​ | Intrinsic Value
​ |  | Options |  | Price |  | Term |  | (in thousands)
Outstanding at June 30, 2019 |  | 515,884 |  | $ | 33.74 | ​ | ​ | ​ | ​ | ​
Granted |  | — |  | ​ | — | ​ | ​ | ​ | ​ | ​
Exercised |  | (167,306) |  | ​ | 16.92 | ​ | ​ | ​ | ​ | ​
Expired or forfeited |  | — |  | ​ | — | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2019 |  | 348,578 |  | ​ | 41.81 |  | 2.8 years | ​ | $ | 20,829
Exercisable at September 30, 2019 |  | 314,261 | ​ | ​ | 37.82 |  | 2.2 years | ​ | ​ | 20,030
​ The following summarizes RSU award activity during the three months ended September 30, 2019: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | Average
​ |  | Shares |  | Fair Value
Nonvested at June 30, 2019 |  | 521,140 | ​ | $ | 73.97
Granted |  | 272,489 | ​ | ​ | 86.98
Vested |  | (360,866) | ​ | ​ | 68.11
Forfeited |  | (4,041) | ​ | ​ | 77.57
Nonvested at September 30, 2019 |  | 428,722 | ​ | ​ | 87.14
​ As of September 30, 2019, there were approximately 1.1 million shares available for grant under the 2012 Plan. Under the terms of the 2012 Plan, RSUs and restricted stock granted from the pool of shares available for grant reduce the pool by 1.87 shares for each award granted. RSUs and restricted stock forfeited and returned to the pool of shares available for grant increase the pool by 1.87 shares for each award forfeited. ​ We granted 96,151 and 80,326 performance-based RSUs during the three months ended September 30, 2018 and 2019, respectively. These performance based RSU awards are contingent on the achievement of certain performance metrics. The payout related to these awards can range from zero to 280% of the original number of shares or units awarded. ​ Stock Repurchase Program ​ In March 2018, the Board of Directors authorized a stock repurchase program of up to 1,000,000 shares. Repurchases may be made from time to time under the program through open-market purchases or privately-negotiated transactions at our discretion. Upon repurchase, the shares are restored to the status of authorized but unissued shares and we record them as a reduction in the number of shares of Common Stock issued and outstanding in our consolidated financial statements. ​ During the three months ended September 30, 2019, we repurchased 126,051 shares of our common stock. As of September 30, 2019, 436,656 shares were available for additional repurchase under the current stock repurchase program. ​ Dividends ​ We have not paid any cash dividends since the consummation of our initial public offering in 1997 and we do not currently intend to pay any cash dividends in the foreseeable future. Our Board of Directors will determine the payment of future cash dividends, if any. Certain of our current bank credit facilities restrict the payment of cash dividends and future borrowings may contain similar restrictions.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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