XML 62 R34.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Measurement of Assets and Liabilities - Summary of Company's Financial Instruments, Fair Value on a Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
    
Cash equivalents    
Total cash equivalents $ 742 $ 487
Available-for-sale:    
Total short-term marketable securities 13,503 19,178
Total long-term marketable securities   3,443
Total financial assets 14,245 23,108
Fair Value, Measurements, Recurring [Member] | Government agency securities [Member]
    
Available-for-sale:    
Total short-term marketable securities 1,150 2,351
Fair Value, Measurements, Recurring [Member] | Municipal bonds [Member]
    
Available-for-sale:    
Total short-term marketable securities 976 2,829
Fair Value, Measurements, Recurring [Member] | Certificates of deposit [Member]
    
Available-for-sale:    
Total short-term marketable securities 3,220 3,360
Total long-term marketable securities   1,300
Fair Value, Measurements, Recurring [Member] | Corporate debentures / bonds [Member]
    
Available-for-sale:    
Total short-term marketable securities 8,157 10,638
Total long-term marketable securities   2,143
Fair Value, Measurements, Recurring [Member] | US Treasury securities [Member]
    
Cash equivalents    
Total cash equivalents 742 487
Level 1 [Member]
    
Cash equivalents    
Total cash equivalents 0 0
Available-for-sale:    
Total short-term marketable securities 0 0
Total long-term marketable securities   0
Total financial assets 0 0
Level 1 [Member] | Government agency securities [Member]
    
Available-for-sale:    
Total short-term marketable securities 0 0
Level 1 [Member] | Municipal bonds [Member]
    
Available-for-sale:    
Total short-term marketable securities 0 0
Level 1 [Member] | Certificates of deposit [Member]
    
Available-for-sale:    
Total short-term marketable securities 0 0
Total long-term marketable securities   0
Level 1 [Member] | Corporate debentures / bonds [Member]
    
Available-for-sale:    
Total short-term marketable securities 0 0
Total long-term marketable securities   0
Level 1 [Member] | US Treasury securities [Member]
    
Cash equivalents    
Total cash equivalents 0 0
Level 2 [Member]
    
Cash equivalents    
Total cash equivalents 742 487
Available-for-sale:    
Total short-term marketable securities 13,503 19,178
Total long-term marketable securities   3,443
Total financial assets 14,245 23,108
Level 2 [Member] | Government agency securities [Member]
    
Available-for-sale:    
Total short-term marketable securities 1,150 2,351
Level 2 [Member] | Municipal bonds [Member]
    
Available-for-sale:    
Total short-term marketable securities 976 2,829
Level 2 [Member] | Certificates of deposit [Member]
    
Available-for-sale:    
Total short-term marketable securities 3,220 3,360
Total long-term marketable securities   1,300
Level 2 [Member] | Corporate debentures / bonds [Member]
    
Available-for-sale:    
Total short-term marketable securities 8,157 10,638
Total long-term marketable securities   2,143
Level 2 [Member] | US Treasury securities [Member]
    
Cash equivalents    
Total cash equivalents $ 742 $ 487