Other Balance Sheet Accounts
 12 Months Ended
Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Other Balance Sheet Accounts

5. Other Balance Sheet Accounts

Property and equipment consisted of the following at December 31 (in thousands):

 

 

 

2016

 

 

2015

 

Equipment

 

$

17,043

 

 

$

17,425

 

Leasehold improvements

 

 

8,144

 

 

 

8,048

 

 

 

 

25,187

 

 

 

25,473

 

Less accumulated depreciation and amortization

 

 

(24,014

)

 

 

(23,600

)

 

 

$

1,173

 

 

$

1,873

 

 

Depreciation and amortization of equipment and leasehold improvements for the years ended December 31, 2016, 2015 and 2014, was $0.9 million, $0.9 million and $1.4 million, respectively.

Intangible assets consisted of the following at December 31 (in thousands):

 

 

 

2016

 

 

2015

 

Patent application costs

 

$

1,500

 

 

$

2,252

 

Accumulated amortization patent costs

 

 

(690

)

 

 

(952

)

 

 

$

810

 

 

$

1,300

 

 

Amortization of licensed technology rights and patent application costs for the years ended December 31, 2016, 2015 and 2014, was $0.1 million, $0.2 million and $0.2 million, respectively. Estimated annual amortization for these assets is  $0.1 million for each of the years in the period from 2017 to 2021, and $0.3 million being recognized thereafter.

Accounts payable and accrued expenses consisted of the following at December 31 (in thousands):

 

 

 

2016

 

 

2015

 

Employee compensation

 

$

2,518

 

 

$

2,220

 

Clinical trial accruals

 

 

446

 

 

 

102

 

Accounts payable

 

 

326

 

 

 

733

 

Deferred rent

 

 

223

 

 

 

496

 

Other accrued liabilities

 

 

614

 

 

 

361

 

 

 

$

4,127

 

 

$

3,912