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Fair Value Measurement (Detail) - (Table) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2016
Dec. 31, 2016
Aug. 13, 2014
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period 231,837       214,328        
Business Acquisition, Contingent Consideration, Actual Cash Payment   $ 8,000 $ 1,767,000 $ 2,798,000 $ 3,482,000 $ 1,000      
Changes in fair value on contingent liability $ 832,000       0        
Assets:                  
Available-for-sale Securities, Current 45,682,000 39,495,000     34,419,000     $ 39,495,000  
Notes Receivable, Related Parties, Noncurrent 2,555,000 2,644,000     2,903,000     2,644,000  
Available-for-sale Securities, Noncurrent 53,298,000 70,559,000     87,575,000     70,559,000  
Contingent payment liability 23,050,000 0     4,941,000     0  
Liabilities:                  
Foreign Currency Contract, Asset, Fair Value Disclosure 12,000 191,000           191,000  
Available-for-sale Securities, Gross Unrealized Loss 208,000       $ 443,000        
Available-for-sale Securities, Gross Unrealized Gain $ 109,000                
Share based compensation arrangement by share based payment award options exercisable during period weighted average exercise price - in dollars per share $ 32.65       $ 31.63        
Repayment of Notes Receivable from Related Parties $ (103,000)       $ (103,000)        
Increase (Decrease) in Accrued Interest Receivable, Net 14,000       16,000        
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability 0       (3,483,000)   $ 0 16,402,000  
Fair Value [Member]                  
Assets:                  
Cash Equivalents 3,311,000 3,309,000           3,309,000  
Current marketable securities – available for sale   39,495,000           39,495,000  
Long-term marketable securities – available for sale   70,559,000           70,559,000  
Total assets 102,303,000 113,554,000           113,554,000  
Contingent payment liability 31,830,000 7,948,000       $ 24,775,000   7,948,000  
Liabilities:                  
Total liabilities 31,830,000 7,948,000           7,948,000  
Fair Value, Inputs, Level 1 [Member]                  
Assets:                  
Cash Equivalents 3,311,000 3,309,000           3,309,000  
Current marketable securities – available for sale 45,682,000 39,495,000           39,495,000  
Long-term marketable securities – available for sale 53,298,000 70,559,000           70,559,000  
Total assets 102,291,000 113,363,000           113,363,000  
Contingent payment liability 0 0           0  
Liabilities:                  
Total liabilities 0 0           0  
Fair Value, Inputs, Level 2 [Member]                  
Assets:                  
Cash Equivalents 0 0           0  
Current marketable securities – available for sale 0 0           0  
Long-term marketable securities – available for sale 0 0           0  
Total assets 12,000 191,000           191,000  
Contingent payment liability 0 0           0  
Liabilities:                  
Total liabilities 0 0           0  
Foreign Currency Contract, Asset, Fair Value Disclosure 12,000                
Fair Value, Inputs, Level 3 [Member]                  
Assets:                  
Cash Equivalents 0 0           0  
Current marketable securities – available for sale 0 0           0  
Long-term marketable securities – available for sale 0 0           0  
Total assets 0 0           0  
Contingent payment liability 31,830,000 7,948,000           7,948,000  
Liabilities:                  
Total liabilities 31,830,000 $ 7,948,000           7,948,000  
Dolce Vita [Member]                  
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High                 $ 5,000,000
Other Long-term Investments [Member]                  
Liabilities:                  
Available-for-sale Securities, Gross Unrealized Loss $ 45,000       350,000        
Available-for-sale Securities, Gross Unrealized Gain         $ 296,000        
Changes Measurement [Member]                  
Liabilities:                  
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability             $ 832,000 $ (425,000)