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Supplemental Consolidated Balance Sheet and Statement of Operations Information
 3 Months Ended
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Supplemental Consolidated Balance Sheet and Statement of Operations Information Supplemental Consolidated Balance Sheet and Statement of Operations Information
Accrued Expenses and Other Current Liabilities
Accrued expenses and other current liabilities consisted of (in thousands):
March 31, 2018December 31, 2017
Accrued vacation $6,849 $6,087 
Accrued commissions 2,898 3,297 
Accrued bonuses 3,587 4,419 
Estimated health insurance claims 1,000 1,090 
ESPP employee contributions 1,016 1,419 
Customer deposits 6,851 — 
Accrued other liabilities 4,182 3,900 
$26,383 $20,212 
Other Income, net
Other income, net for the three months ended March 31, 2018 and 2017 consisted of (in thousands):
Three months ended March 31,
20182017
Interest income $223 $91 
Income from training reimbursement program 108 538 
Other 12 (17)
$343 $612