XML 48 R35.htm IDEA: XBRL DOCUMENT v3.19.1
Note 3 - Restricted Cash - Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Restricted cash $ 692,275 $ 1,038,767 $ 508,751  
Cash and cash equivalents 10,157,438 17,105,072 60,171,072  
Total Cash, Cash Equivalents, and Restricted Cash as Presented in the Consolidated Statement of Cash Flows 10,849,713 18,143,839 $ 60,679,823 $ 7,230,570
Insurance Premium Escrow [Member]        
Restricted cash $ 692,275 $ 1,038,767