Note 11 - Segment Information - Summary of Financial Information Concerning Company's Reportable Segments (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer, Including Assessed Tax		$ 3,589,899	$ 1,332,743
Cost of revenue		816,113	978,626
Operating expenses		2,072,467	2,323,773
Other income (expense)		(4,569,481)	(1,336,303)
Income (loss) from continuing operations		(3,868,162)	(3,305,959)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total		(1,510,475)	(915,163)
Goodwill		212,445	212,445
Identifiable assets		11,899,644	24,519,452
Asset Management [Member]
Revenue from Contract with Customer, Including Assessed Tax		1,773,276	(775,249)
Cost of revenue
Operating expenses		410,226	286,283
Other income (expense)		36,565	41,632
Income (loss) from continuing operations		1,399,615	(1,019,900)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total
Goodwill
Identifiable assets		10,186,353	8,496,917
Real Estate [Member]
Revenue from Contract with Customer, Including Assessed Tax		537,763	778,657
Cost of revenue		485,459	450,859
Operating expenses		338,025	920,309
Other income (expense)		(4,712,766)	(1,416,257)
Income (loss) from continuing operations		(4,998,487)	(2,008,768)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total
Goodwill
Identifiable assets		556,994	12,550,571
Internet Operations [Member]
Revenue from Contract with Customer, Including Assessed Tax		1,066,229	1,168,843
Cost of revenue		330,654	325,234
Operating expenses		223,118	241,654
Other income (expense)		10,169	35,649
Income (loss) from continuing operations		522,626	637,604
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total
Goodwill		212,445	212,445
Identifiable assets		414,935	430,503
Product and Service, Other [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 212,631	212,631	160,492
Cost of revenue			202,533
Operating expenses		1,101,098	875,527
Other income (expense)		96,551	2,673
Income (loss) from continuing operations		(791,916)	(914,895)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total
Goodwill
Identifiable assets		740,934	1,508,601
Home Service [Member] \| Discontinued Operations [Member]
Revenue from Contract with Customer, Including Assessed Tax
Cost of revenue
Operating expenses
Other income (expense)
Income (loss) from continuing operations
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total		(1,510,475)	(915,163)
Goodwill
Identifiable assets		$ 428	$ 1,532,860

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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