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Stockholder's Equity (Tables)
6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of share-based payment award, stock options, valuation assumptions The weighted average assumptions utilized to determine the fair value of options granted during the six months ended June 30, 2020 and 2019 are as follows:
Six months ended June 30,
 20202019
Risk-free interest rate%1.93 %
Expected volatility%36.95 %
Expected life (in years)0.004.27
Dividend yield%%
Schedule of share-based compensation, employee stock purchase plan
The following table presents stock-based compensation expense, including under the ESPP, in the Company's consolidated statements of operations for the three and six months ended June 30, 2020 and 2019:

Three months ended June 30,Six months ended June 30,
2020201920202019
Cost of product sales$34  $61  $74  $102  
Research and development137  196  290  368  
Sales, marketing and support139  212  293  394  
General and administrative432  564  890  1,043  
$742  $1,033  $1,547  $1,907  
Schedule of accumulated other comprehensive income (loss)
The balances for the three months ended June 30, 2020 and 2019 are as follows:
Foreign Currency TranslationTotal Accumulated Other Comprehensive Loss
Balance, March 31, 2020$(5,247) $(5,247) 
Other comprehensive loss(130) (130) 
Net other comprehensive loss(130) (130) 
Balance, June 30, 2020$(5,377) $(5,377) 
Foreign Currency TranslationInterest Rate SwapsTotal Accumulated Other Comprehensive Loss
Balance, March 31, 2019$(13,640) $(3) $(13,643) 
Other comprehensive (loss) income before reclassifications(1,332)  (1,329) 
Amounts reclassified from AOCI11,483  —  11,483  
Net other comprehensive income10,151   10,154  
Balance, June 30, 2019$(3,489) $—  $(3,489) 

The balances for the six months ended June 30, 2020 and 2019 are as follows:
Foreign Currency TranslationTotal Accumulated Other Comprehensive Loss
Balance, December 31, 2019$(2,767) $(2,767) 
Other comprehensive loss(2,610) (2,610) 
Net other comprehensive loss(2,610) (2,610) 
Balance, June 30, 2020$(5,377) $(5,377) 
 
Foreign Currency TranslationInterest Rate SwapsTotal Accumulated Other Comprehensive Loss
Balance, December 31, 2018$(14,720) $(11) $(14,731) 
Other comprehensive (loss) income before reclassifications (252)  (249) 
Amounts reclassified from AOCI11,483   11,491  
Net other comprehensive income11,231  11  11,242  
Balance, June 30, 2019$(3,489) $—  $(3,489)