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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Summary of Significant Accounting Policies [Abstract]  
Comprehensive Income, Policy [Policy Text Block] Comprehensive Loss:

Comprehensive loss is the total of net earnings and all other non-owner changes in equity. Comprehensive loss for the Company includes net income, foreign currency translation adjustments, cash flow hedging and unrealized gains and losses on marketable securities. The accumulated balances for each component of other comprehensive loss attributable to the Company are as follows:

 
2019
 
2018
Currency translation adjustment
$
(29,636
)
 
$
(33,091
)
Cash flow hedges, net of tax
(804
)
 
530

Unrealized loss on securities, net of tax
—

 
(67
)
Accumulated other comprehensive loss
$
(30,440
)
 
$
(32,628
)
Investments Classified by Contractual Maturity Date [Table Text Block] The schedule of maturities at December 31, 2019 and 2018 is as follows:


Maturities as of
December 31, 2019

Maturities as of
December 31, 2018

1 Year or Less

1 to 4 Years

1 Year or Less

1 to 4 Years
Corporate bonds
$
—


$
—


$
24,617


$
—

Certificates of deposit
40,521


—


42,351


—

Total
$
40,521


$
—


$
66,968


$
—