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Note 7 - Property and Equipment | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 7. Property and Equipment Property and equipment is stated at cost and consists of the following:
|  | December 31,
|  | 2017 |  | 2016
Equipment and software |  | $ | 37,137 |  |  | $ | 27,456 |
Furniture and fixtures |  |  | 1,947 |  |  |  | 1,126 |
Leasehold improvements |  |  | 31,459 |  |  |  | 27,796 |
Construction in progress |  |  | 5,830 |  |  |  | 22,695 |
Subtotal |  |  | 76,373 |  |  |  | 79,073 |
Less accumulated depreciation |  |  | (20,190 | ) |  |  | (26,777 | )
Total |  | $ | 56,183 |  |  | $ | 52,296 |
Construction-in-progress at December 31, 2017, primarily represents the costs incurred for the implementation of a new ERP that was placed in service in January 2018. Construction-in-progress at December 31, 2016 primarily represented the costs being incurred in our strategic project that we began in 2015 to insource the manufacturing of our HYAFF-based products to our Bedford, Massachusetts facility, which was placed in service in December 2017. In 2017 we retired $9.8 million of fully depreciated assets that were no longer in use. Depreciation expense was $3.3 million, $2.7 million, and $2.7 million for the years ended December 31, 2017, 2016, and 2015, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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