Note 11 - Costs to Obtain and Fulfill a Contract - Capitalized Contract Costs Activity (Details) - Deferred Costs of Acquisition [Member] $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)
Balance	$ 109,167
Deferral of costs	44,436
Recognized costs	(41,583)
Balance	$ 112,020

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

Name:	us-gaap_CapitalizedContractCostNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant