STOCK-BASED COMPENSATION	6 Months Ended
Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION The Company recognizes in the statements of income the grant-date fair value of stock options and other equity based compensation, such as shares issued under employee stock purchase plans, restricted stock awards, restricted stock units, performance unit awards and stock appreciation rights (SARs), issued to employees and directors. The grant-date fair value of stock options is determined using the Black-Scholes option pricing model. The fair value of share-based awards is recognized as compensation expense on a straight-line basis over the requisite service period, net of estimated forfeitures. The Company relies primarily upon historical experience to estimate expected forfeitures and recognizes compensation expense on a straight-line basis from the date of the grant. The Company issues new shares upon the respective grant, exercise or vesting of share-based payment awards, as applicable. Cash-settled SARs awarded in share-based payment transactions are classified as liability awards; accordingly, the Company records these awards as a component of accrued expenses on its consolidated balance sheets. The fair value of each SAR is estimated using the Black-Scholes option pricing model and is remeasured at each reporting period until the award is settled. Changes in the fair value of the liability award are recorded as expense or income in the statements of income. Performance unit awards are subject to either a performance-based or market-based vesting requirement. For performance-based vesting, the grant-date fair value of the award, based on fair value of the Company's common stock, is recognized over the service period, based on an assessment of the likelihood that the applicable performance goals will be achieved and compensation expense is periodically adjusted based on actual and expected performance. Compensation expense for performance unit awards with market-based vesting is calculated based on the estimated fair value as of the grant date utilizing a Monte Carlo simulation model and is recognized over the service period on a straight-line basis. Equity Compensation Plan In 1995, the Board of Directors of the Company (the “Board”) adopted a stock option plan, which was amended and restated in 2003, 2011, and 2013 and is now called the Equity Compensation Plan. The Equity Compensation Plan provides for the granting of incentive and nonqualified stock options, shares of common stock, SARs, and performance units to employees, directors and consultants of the Company. Stock options are exercisable over periods determined by the Compensation Committee, but for no longer than 10 years from the grant date. Through June 30, 2013, the Company’s shareholders have approved increases in the number of shares reserved for issuance under the Equity Compensation Plan to 8,000,000 and have extended the term of the plan through September 1, 2015. Restricted Stock Awards and Restricted Stock Units During the six months ended June 30, 2013 the Company granted 115,921 shares of restricted stock awards and restricted stock units to employees, which had a total fair value of $3.8 million on the respective dates of grant, and will vest over two to three years from the date of grant, provided that the grantee is still an employee of the Company on the applicable vesting date. For the three months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $1.1 million and $755,000 and research and development expense of $417,000 and $339,000, respectively, related to restricted stock awards and restricted stock units. For the six months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $1.9 million and $1.3 million and research and development expense of $744,000 and $510,000, respectively, related to restricted stock awards and restricted stock units. In connection with the vesting of restricted common stock previously issued to employees, for the six months ended June 30, 2013, 94,087 shares of common stock with a fair value of $3.0 million were withheld in satisfaction of tax withholding obligations. Performance Unit Awards During the six months ended June 30, 2013 the Company granted 35,776 performance units, of which 17,888 are subject to a performance-based vesting requirement and 17,888 are subject to a market-based vesting requirement and will vest over the terms described above. Total fair value of the performance unit awards granted was $1.4 million on the date of grant. Each performance unit award is subject to both a performance-vesting requirement (either performance-based or market-based) and a service-vesting requirement. The performance-based vesting requirement is tied to the Company's cumulative revenue growth compared to the cumulative revenue growth of companies comprising the Nasdaq Electronics Components Index, as measured over a two-year performance period beginning January 1, 2013 and ending December 31, 2014. The market-based vesting requirement is tied to the Company's total shareholder return relative to the total shareholder return of companies comprising the Nasdaq Electronics Components Index, as measured over a two-year performance period beginning January 1, 2013 and ending December 31, 2014. The maximum number of performance units that may vest based on performance is two times the shares granted. Further, if the Company's total shareholder return is negative, the performance units may not vest above the shares granted. For the three months ended June 30, 2013, the Company recorded general and administrative expense of $137,000 and research and development expense of $42,000 related to performance units. For the six months ended June 30, 2013, the Company recorded general and administrative expense of $175,000 and research and development expense of $53,000 related to performance units. Employee Stock Grants For the three months ended June 30, 2012, the Company recorded research and development expense of $37,000 related to fully vested shares issued to employees. For the six months ended June 30, 2012, the Company recorded research and development expense of $68,000 related to fully vested shares issued to employees. No such grants were made or expenses recorded in 2013. Stock Appreciation Rights During 2011, the Company granted 24,000 cash-settled SARs to certain executive officers. The SARs represented the right to receive, for each SAR, a cash payment equal to the amount, if any, by which the fair market value of a share of the common stock of the Company on the vesting date exceeded the base price of the SAR award. The base price of each SAR award was $34.78 per share. The SARs vested on the first anniversary of the date of grant, provided that the grantee was still an employee of the Company on the applicable vesting date. During the three months ended March 31, 2012, all SARs were settled, resulting in cash payments of $49,000. The Company recorded $1,000 to general and administrative expense, and $3,000 to research and development expense, for the six months ended June 30, 2012, related to the SARs. No such grants were made in 2013 or 2012. Other Compensation During the six months ended June 30, 2013, the Company issued 10,000 shares of common stock to members of the Board as partial compensation for their service on the Board. The Company recorded general and administrative expense of $126,000 and $160,000 for the three months ended June 30, 2013 and 2012, respectively, and $264,000 and $320,000 for the six months ended June 30, 2013 and 2012, respectively, related to shares issued to members of the Board. During the six months ended June 30, 2013, the Company granted 7,370 shares of restricted stock to certain members of its Scientific Advisory Board. These shares of restricted stock will vest and be issued in equal increments annually over three years from the date of grant, provided that the grantee is still engaged as a consultant of the Company on the applicable vesting date. The Company recorded research and development expense of $43,000 and $63,000 for the three months ended June 30, 2013 and 2012, respectively, and $129,000 and $116,000 for the six months ended June 30, 2013 and 2012, respectively, related to shares issued to members of its Scientific Advisory Board. Employee Stock Purchase Plan On April 7, 2009, the Board adopted an Employee Stock Purchase Plan (ESPP). The ESPP was approved by the Company’s shareholders and became effective on June 25, 2009. The Company has reserved 1,000,000 shares of common stock for issuance under the ESPP. Unless sooner terminated by the Board, the ESPP will expire when all reserved shares have been issued. Eligible employees may elect to contribute to the ESPP through payroll deductions during consecutive three-month purchase periods, the first of which began on July 1, 2009. Each employee who elects to participate will be deemed to have been granted an option to purchase shares of the Company’s common stock on the first day of the purchase period. Unless the employee opts out during the purchase period, the option will automatically be exercised on the last day of the period, which is the purchase date, based on the employee’s accumulated contributions to the ESPP. The purchase price will equal 85% of the lesser of the price per share of common stock on the first day of the period or the last day of the period. Employees may allocate up to 10% of their base compensation to purchase shares of common stock under the ESPP; however, each employee may purchase no more than 12,500 shares on a given purchase date, and no employee may purchase more than $25,000 of common stock under the ESPP during a given calendar year. During the six months ended June 30, 2013 and 2012, the Company issued 7,775 and 4,461 shares of its common stock, respectively, under the ESPP, resulting in proceeds of $177,000 and $137,000, respectively. For the three months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $8,000 and $5,000 and research and development expense of $19,000 and $15,000, respectively, related to the ESPP. For the six months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $15,000 and $10,000 and research and development expense of $42,000 and $35,000, respectively, related to the ESPP. The expense recorded equals the amount of the discount and the value of the look-back feature for the shares that were issued under the ESPP.

STOCK-BASED COMPENSATION

The Company recognizes in the statements of income the grant-date fair value of stock options and other equity based compensation, such as shares issued under employee stock purchase plans, restricted stock awards, restricted stock units, performance unit awards and stock appreciation rights (SARs), issued to employees and directors.

The grant-date fair value of stock options is determined using the Black-Scholes option pricing model. The fair value of share-based awards is recognized as compensation expense on a straight-line basis over the requisite service period, net of estimated forfeitures. The Company relies primarily upon historical experience to estimate expected forfeitures and recognizes compensation expense on a straight-line basis from the date of the grant. The Company issues new shares upon the respective grant, exercise or vesting of share-based payment awards, as applicable.

Cash-settled SARs awarded in share-based payment transactions are classified as liability awards; accordingly, the Company records these awards as a component of accrued expenses on its consolidated balance sheets. The fair value of each SAR is estimated using the Black-Scholes option pricing model and is remeasured at each reporting period until the award is settled. Changes in the fair value of the liability award are recorded as expense or income in the statements of income.

Performance unit awards are subject to either a performance-based or market-based vesting requirement. For performance-based vesting, the grant-date fair value of the award, based on fair value of the Company's common stock, is recognized over the service period, based on an assessment of the likelihood that the applicable performance goals will be achieved and compensation expense is periodically adjusted based on actual and expected performance. Compensation expense for performance unit awards with market-based vesting is calculated based on the estimated fair value as of the grant date utilizing a Monte Carlo simulation model and is recognized over the service period on a straight-line basis.

Equity Compensation Plan

In 1995, the Board of Directors of the Company (the “Board”) adopted a stock option plan, which was amended and restated in 2003, 2011, and 2013 and is now called the Equity Compensation Plan. The Equity Compensation Plan provides for the granting of incentive and nonqualified stock options, shares of common stock, SARs, and performance units to employees, directors and consultants of the Company. Stock options are exercisable over periods determined by the Compensation Committee, but for no longer than 10 years from the grant date. Through June 30, 2013, the Company’s shareholders have approved increases in the number of shares reserved for issuance under the Equity Compensation Plan to 8,000,000 and have extended the term of the plan through September 1, 2015.

Restricted Stock Awards and Restricted Stock Units

During the six months ended June 30, 2013 the Company granted 115,921 shares of restricted stock awards and restricted stock units to employees, which had a total fair value of $3.8 million on the respective dates of grant, and will vest over two to three years from the date of grant, provided that the grantee is still an employee of the Company on the applicable vesting date.

For the three months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $1.1 million and $755,000 and research and development expense of $417,000 and $339,000, respectively, related to restricted stock awards and restricted stock units.

For the six months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $1.9 million and $1.3 million and research and development expense of $744,000 and $510,000, respectively, related to restricted stock awards and restricted stock units.

In connection with the vesting of restricted common stock previously issued to employees, for the six months ended June 30, 2013, 94,087 shares of common stock with a fair value of $3.0 million were withheld in satisfaction of tax withholding obligations.

Performance Unit Awards

During the six months ended June 30, 2013 the Company granted 35,776 performance units, of which 17,888 are subject to a performance-based vesting requirement and 17,888 are subject to a market-based vesting requirement and will vest over the terms described above. Total fair value of the performance unit awards granted was $1.4 million on the date of grant.

Each performance unit award is subject to both a performance-vesting requirement (either performance-based or market-based) and a service-vesting requirement.

The performance-based vesting requirement is tied to the Company's cumulative revenue growth compared to the cumulative revenue growth of companies comprising the Nasdaq Electronics Components Index, as measured over a two-year performance period beginning January 1, 2013 and ending December 31, 2014. The market-based vesting requirement is tied to the Company's total shareholder return relative to the total shareholder return of companies comprising the Nasdaq Electronics Components Index, as measured over a two-year performance period beginning January 1, 2013 and ending December 31, 2014.

The maximum number of performance units that may vest based on performance is two times the shares granted. Further, if the Company's total shareholder return is negative, the performance units may not vest above the shares granted.

For the three months ended June 30, 2013, the Company recorded general and administrative expense of $137,000 and research and development expense of $42,000 related to performance units.

For the six months ended June 30, 2013, the Company recorded general and administrative expense of $175,000 and research and development expense of $53,000 related to performance units.

Employee Stock Grants

For the three months ended June 30, 2012, the Company recorded research and development expense of $37,000 related to fully vested shares issued to employees.

For the six months ended June 30, 2012, the Company recorded research and development expense of $68,000 related to fully vested shares issued to employees.

No such grants were made or expenses recorded in 2013.

Stock Appreciation Rights

During 2011, the Company granted 24,000 cash-settled SARs to certain executive officers. The SARs represented the right to receive, for each SAR, a cash payment equal to the amount, if any, by which the fair market value of a share of the common stock of the Company on the vesting date exceeded the base price of the SAR award. The base price of each SAR award was $34.78 per share. The SARs vested on the first anniversary of the date of grant, provided that the grantee was still an employee of the Company on the applicable vesting date. During the three months ended March 31, 2012, all SARs were settled, resulting in cash payments of $49,000. The Company recorded $1,000 to general and administrative expense, and $3,000 to research and development expense, for the six months ended June 30, 2012, related to the SARs. No such grants were made in 2013 or 2012.

Other Compensation

During the six months ended June 30, 2013, the Company issued 10,000 shares of common stock to members of the Board as partial compensation for their service on the Board. The Company recorded general and administrative expense of $126,000 and $160,000 for the three months ended June 30, 2013 and 2012, respectively, and $264,000 and $320,000 for the six months ended June 30, 2013 and 2012, respectively, related to shares issued to members of the Board.

During the six months ended June 30, 2013, the Company granted 7,370 shares of restricted stock to certain members of its Scientific Advisory Board. These shares of restricted stock will vest and be issued in equal increments annually over three years from the date of grant, provided that the grantee is still engaged as a consultant of the Company on the applicable vesting date. The Company recorded research and development expense of $43,000 and $63,000 for the three months ended June 30, 2013 and 2012, respectively, and $129,000 and $116,000 for the six months ended June 30, 2013 and 2012, respectively, related to shares issued to members of its Scientific Advisory Board.

Employee Stock Purchase Plan

On April 7, 2009, the Board adopted an Employee Stock Purchase Plan (ESPP). The ESPP was approved by the Company’s shareholders and became effective on June 25, 2009. The Company has reserved 1,000,000 shares of common stock for issuance under the ESPP. Unless sooner terminated by the Board, the ESPP will expire when all reserved shares have been issued.

Eligible employees may elect to contribute to the ESPP through payroll deductions during consecutive three-month purchase periods, the first of which began on July 1, 2009. Each employee who elects to participate will be deemed to have been granted an option to purchase shares of the Company’s common stock on the first day of the purchase period. Unless the employee opts out during the purchase period, the option will automatically be exercised on the last day of the period, which is the purchase date, based on the employee’s accumulated contributions to the ESPP. The purchase price will equal 85% of the lesser of the price per share of common stock on the first day of the period or the last day of the period.

Employees may allocate up to 10% of their base compensation to purchase shares of common stock under the ESPP; however, each employee may purchase no more than 12,500 shares on a given purchase date, and no employee may purchase more than $25,000 of common stock under the ESPP during a given calendar year.

During the six months ended June 30, 2013 and 2012, the Company issued 7,775 and 4,461 shares of its common stock, respectively, under the ESPP, resulting in proceeds of $177,000 and $137,000, respectively.

For the three months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $8,000 and $5,000 and research and development expense of $19,000 and $15,000, respectively, related to the ESPP.

For the six months ended June 30, 2013 and 2012, the Company recorded general and administrative expense of $15,000 and $10,000 and research and development expense of $42,000 and $35,000, respectively, related to the ESPP.

The expense recorded equals the amount of the discount and the value of the look-back feature for the shares that were issued under the ESPP.