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Accounts Receivables (Tables)
 12 Months Ended
Jan. 31, 2019
Receivables [Abstract]  
Accounts Receivable
Accounts receivables consisted of the following (in thousands):
 
As of January 31, 2019
 
As of January 31, 2018
 
Current
 
Long-term
 
Total
 
Current
 
Long-term
 
Total
Accounts receivable
$
14,195

 
$
712

 
$
14,907

 
$
14,379

 
$
6,934

 
$
21,313

Less allowance for doubtful accounts
(2,113
)
 
—

 
(2,113
)
 
(3,885
)
 
(2,282
)
 
(6,167
)
Accounts receivable net of allowance for doubtful accounts
$
12,082


$
712


$
12,794

 
$
10,494


$
4,652

 
$
15,146