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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 9 Months Ended
Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Reconciliation of cash, cash equivalents, and restricted cash
The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Company's consolidated balance sheets to the total amount presented in the consolidated statement of cash flows (in thousands):
September 30, 2020December 31, 2019
Cash and cash equivalents at beginning of period$24,762 $21,845 
Current restricted cash at beginning of period943 1,514 
Long-term restricted cash at beginning of period5,295 7,225 
Cash, cash equivalents, and restricted cash at beginning of period$31,000 $30,584 
Cash and cash equivalents at end of period$21,234 $24,762 
Current restricted cash at end of period943 943 
Long-term restricted cash at end of period4,049 5,295 
Cash, cash equivalents, and restricted cash at end of period$26,226 $31,000 
Loyalty deferred revenue The deferred revenue associated with the loyalty program at September 30, 2020 and December 31, 2019 was $3.2 million and $3.1 million, respectively.
Loyalty program(in thousands)
Loyalty deferred revenue as of January 1, 2019$4,231 
Loyalty points forfeited or expired(4,348)
Loyalty points used(9,127)
Loyalty points vested11,320 
Loyalty points unvested1,051 
Loyalty deferred revenue as of December 31, 2019$3,127 

Loyalty deferred revenue as of January 1, 2020$3,127 
Loyalty points forfeited or expired(2,601)
Loyalty points used(6,879)
Loyalty points vested8,404 
Loyalty points unvested1,145 
Loyalty deferred revenue as of September 30, 2020$3,196 
Sales return reserve For the nine months ended September 30, 2020 our sales return reserve consisted of the following (in thousands):
Sales reserve as of January 1, 2019$76 
Provision related to sales made in current period1,037 
Adjustment related to sales made in prior periods31 
Actual returns or credits related to current period(973)
Actual returns or credits related to prior periods(103)
Sales reserve as of December 31, 2019$68 
Sales reserve as of January 1, 2020$68 
Provision related to sales made in current period722 
Adjustment related to sales made in prior periods5 
Actual returns or credits related to current period(647)
Actual returns or credits related to prior periods(68)
Sales reserve as of September 30, 2020$80 
Other Noncurrent Liabilities Other Long-Term LiabilitiesOther long-term liabilities were $7.4 million and $6.2 million as of September 30, 2020 and December 31, 2019, respectively.  As of September 30, 2020 and December 31, 2019, the balance is primarily composed of long-term operating lease obligations of $6.4 million and $5.3 million, respectively. See Note 8, Leases for more information. Additionally, as of September 30, 2020 and December 31, 2019, the Company recorded $0.2 million in other long-term liabilities related to uncertain income tax positions (see Note 7, Income Taxes, of the Company’s 2019 Annual Report). Certain operating leases for the Company’s regional office facilities contain a restoration clause that requires the Company to restore the premises to its original condition. At each of September 30, 2020 and December 31, 2019, accrued restoration costs related to these leases amounted to $0.3 million. At each of September 30, 2020 and December 31, 2019, the Company also recorded a long-term liability for estimated defined benefit obligation related to a non-U.S. defined benefit plan for its Japan operations of $0.3 million (see Note 9, Employee Benefit Plans, of the Company’s 2019 Annual Report).