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Note 10 - Employee Benefit Plan | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Pension and Other Postretirement Benefits Disclosure [Text Block] |
10 . | Employee Benefit Plan
We have a defined contribution 401 (k) plan (“Plan”) covering substantially all of our employees. In the past three calendar years, we made matching cash contributions equal to 50% of each participant’s contribution during the Plan year up to a maximum amount equal to the lesser of 3% of each participant’s annual compensation or $8,100, $7,950 and $7,950 for the years ended December 31, 2017, 2016 and 2015, respectively. Such amounts were recorded as expense in the corresponding years. We may also contribute additional discretionary amounts to the Plan as we determine. For the years ended December 31, 2017, 2016 and 2015, we contributed $0.6 million, $0.6 million and $0.3 million, respectively, to the Plan. No discretionary contributions have been made to the Plan since its inception.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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