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Other Long-Term Assets
 12 Months Ended
Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Long-Term Assets
Other Long-Term Assets
Other long-term assets consisted of the following at December 31 (in thousands):
 
2016
 
2015
Cash surrender value of corporate-owned life insurance policies (Note 1)
$
3,240

 
$
2,180

Prepaid commissions (i)
5,302

 
3,543

Restricted cash (ii)
3,317

 
—

Prepaid expenses, deposits and other (iii)
2,058

 
246

 
$
13,917

 
$
5,969

(i) Prepaid commissions represent customer acquisition costs to secure long-term contracts. The Company capitalizes incremental and direct costs related to a specific contract and recognizes expense over the term of the contract.
(ii) As of December 31, 2016, restricted cash primarily consisted of $2.7 million of sales proceeds related to a long-term contract with a specific customer. These proceeds are held in escrow until certain billing milestones are achieved, and then specified amounts are transferred to the Company's operating accounts. Restricted also contained $0.6 million related to a performance guarantee related to an international customer sales contract.
(iii) Included in long-term assets as of December 31, 2016 was $1.8 million of funds deposited in escrow related to contingent consideration in connection with a business combination (see Note 15). The funds will be held in escrow and released to selling shareholders if certain conditions are subsequently met. If the conditions are not met, the funds will be released back to the Company.