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Accounts Receivable (Tables)
 12 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Accounts receivable and allowance for doubtful accounts balances
Orion's accounts receivable and allowance for doubtful accounts balances were as follows (dollars in thousands):
 
2017
 
2016
Accounts receivable, gross
$
9,315

 
$
11,394

Allowance for doubtful accounts
(144
)
 
(505
)
Accounts receivable, net
$
9,171

 
$
10,889