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Accounts Receivable
 6 Months Ended
Jun. 30, 2020
Receivables [Abstract]  
Accounts Receivable Accounts Receivable
Accounts receivable and the related allowance for doubtful accounts are as follows:
 
 June 30,
2020		December 31, 2019
 (in thousands)
Accounts receivable$56,823  $67,752  
Less:  Allowance for doubtful accounts(429) (353) 
Total, net
$56,394  $67,399  
 
 Three Months EndedSix Months Ended
 June 30,
2020		June 30,
2019		June 30,
2020		June 30,
2019
Allowance for doubtful accounts:(in thousands)
Balance, beginning of period$647  $379  $353  $264  
Provisions (recoveries) for losses on accounts (218) 13  76  128  
receivables, net of adjustments
Balance, end of period$429  $392  $429  $392