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STOCK BASED COMPENSATION
 6 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
STOCK BASED COMPENSATION STOCK BASED COMPENSATION
Stock-Based Compensation Plans
The Company’s 2010 Equity Incentive Plan and 2005 Equity Incentive Plan are described in its Annual Report. As of December 31, 2018, the Company had 10,574,283 authorized shares available for future issuance under all of its stock incentive plans.
Stock-Based Compensation
The following table shows total stock-based compensation expense included in the Consolidated Statements of Operations and Comprehensive Income (Loss) for the three and six months ended December 31, 2018 and 2017 (in thousands):
 Three Months Ended December 31,Six Months Ended December 31,
 2018201720182017
Cost of revenues$261 $40 $294 $285 
Research and development497 370 964 826 
Sales, general and administrative21 370 296 581 
$779 $780 $1,554 $1,692 

Stock Options
The following is a summary of option activity for the Company’s stock incentive plans for the six months ended December 31, 2018:
 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, 2018137,491 $9.15 3.62$10,390 
Exercised(36,126)$10.55 
Balance, December 31, 2018101,365 $8.66 3.12$9,199 
Vested as of December 31, 2018101,365 $8.66 3.12$9,199 
Vested and exercisable as of December 31, 2018101,365 $8.66 3.12$9,199 
During the three months ended December 31, 2018 and 2017, the aggregate intrinsic value of options exercised under the Company’s stock incentive plans was $1.9 million and $1.7 million, respectively, as determined as of the date of option exercise. During the six months ended December 31, 2018 and 2017, the aggregate intrinsic value of options exercised under the Company's stock incentive plans was $3.2 million and $5.5 million, respectively, as determined as of the date of option exercise.
As of December 31, 2018, the Company had no unrecognized compensation costs related to stock options.
The Company did not grant any employee stock options during the three and six months ended December 31, 2018 and 2017.
Restricted Stock Units (“RSUs”)
The following table summarizes the activity of the RSUs made by the Company:
Number of Shares Weighted Average Grant Date Fair Value Per Share 
Non-vested RSUs, June 30, 2018144,100 $53.24 
RSUs granted39,261 $89.51 
RSUs vested(21,673)$49.57 
RSUs canceled(20,603)$57.95 
Non-vested RSUs, December 31, 2018141,085 $63.21 
The intrinsic value of RSUs vested in the three months ended December 31, 2018 and 2017 was $1.1 million and $0.6 million, respectively. The intrinsic value of RSUs vested in the six months ended December 31, 2018 and 2017 was $2.0 million and $1.9 million, respectively. The total intrinsic value of all outstanding RSUs was $14.0 million as of December 31, 2018.
As of December 31, 2018, there were unrecognized compensation costs related to RSUs of $6.3 million which the Company expects to recognize over a weighted average period of 3.7 years.