Note 5 - Fair Value Measurements (Tables)
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12 Months Ended |
Dec. 31, 2016 |
Notes Tables |
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Fair Value, by Balance Sheet Grouping [Table Text Block] |
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| | | | | | | | | | | | | | | | | | | | | Cash and cash equivalents:
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| | $ | 602 | | | $ | 602 | | | $ | 602 | | | $ | - | | | $ | - | |
| | | - | | | | - | | | | - | | | | - | | | | - | | | | $ | 602 | | | $ | 602 | | | $ | 602 | | | $ | - | | | $ | - | |
| | | | | | | | | | | | | | | | | | | | | Contingent consideration:
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| | $ | 1,545 | | | $ | 1,545 | | | $ | - | | | $ | - | | | $ | 1,545 | |
| | | 5,969 | | | | 5,969 | | | | - | | | | - | | | | 5,969 | | | | $ | 7,514 | | | $ | 7,514 | | | $ | - | | | $ | - | | | $ | 7,514 | |
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| | | | | | | | | | | | | | | | | | | | | Cash and cash equivalents:
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| | $ | 7,534 | | | $ | 7,534 | | | $ | 7,534 | | | $ | — | | | $ | — | |
| | | 776 | | | | 776 | | | | 776 | | | | — | | | | — | | | | $ | 8,310 | | | $ | 8,310 | | | $ | 8,310 | | | $ | — | | | $ | — | |
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| | $ | 48 | | | $ | 48 | | | $ | 48 | | | $ | — | | | $ | — | |
| | | 58 | | | | 58 | | | | 58 | | | | — | | | | — | |
| | | 1,115 | | | | 1,115 | | | | 1,115 | | | | — | | | | — | | Government agency securities
| | | 131 | | | | 131 | | | | 131 | | | | — | | | | — | | | | $ | 1,352 | | | $ | 1,352 | | | $ | 1,352 | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | Contingent consideration:
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| | $ | 4,628 | | | $ | 4,628 | | | $ | — | | | $ | — | | | $ | 4,628 | |
| | | 13,921 | | | | 13,921 | | | | — | | | | — | | | | 13,921 | | | | $ | 18,549 | | | $ | 18,549 | | | $ | — | | | $ | — | | | $ | 18,549 | |
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Fair Value Measurements, Nonrecurring [Table Text Block] |
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Fair Value Measurements as of | | | |
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December 31, 2016 | | | |
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| | $ | - | | | $ | - | | | $ | - | | | $ | - | |
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| | $ | - | | | $ | - | | | $ | - | | | $ | - | |
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Fair Value Measurements as of | | | |
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December 31, 2015 | | | |
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| | $ | 2,625 | | | $ | - | | | $ | - | | | $ | 2,625 | |
| | | 1,034 | | | | - | | | | - | | | | 1,034 | |
| | $ | 3,659 | | | $ | - | | | $ | - | | | $ | 3,659 | |
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Fair Value Measurements as of | | | |
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| | $ | - | | | $ | - | | | $ | - | | | $ | - | |
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Contingent Consideration [Member] |
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Notes Tables |
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Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] |
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| | Balance as of January 1, 2015
| | $ | 4,476 | | | $ | 22,066 | | | $ | 26,542 | |
| | | - | | | | - | | | | - | |
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| | | 152 | | | | (8,145 | ) | | | (7,993 | ) | Balance as of December 31, 2015
| | | 4,628 | | | | 13,921 | | | | 18,549 | |
| | | 325 | | | | 975 | | | | 1,300 | |
| | | (475 | ) | | | - | | | | (475 | ) |
| | | (2,933 | ) | | | (8,927 | ) | | | (11,860 | ) | Balance as of December 31, 2016
| | $ | 1,545 | | | $ | 5,969 | | | $ | 7,514 | |
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