Acquisition and Purchase Price Allocation - Hotel Kranichhohe (Details) $ / shares in Units, € in Thousands, $ in Thousands			3 Months Ended	12 Months Ended
	Dec. 21, 2016 USD ($) room item	Dec. 21, 2016 EUR (€) item	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 21, 2016 EUR (€) room
Business Combination, Consideration Transferred.
Cash paid | $			$ 390
Total purchase price consideration | $			$ 4,517
Hotel Kranichhöhe
Business Acquisition
Number of Rooms in Hotel | room	107					107
Number of food and beverage outlets | item	3	3
Number of meeting rooms | item	18	18
Number of indoor courts | item	2	2
Number of outdoor courts | item	2	2
Business Combination, Consideration Transferred.
Cash paid	$ 957	€ 900
Loan	4,251	4,000
Total purchase price consideration	5,208	4,900
Gain on bargain purchase	124	€ 117
Final fair value of assets acquired	5,332					€ 5,017
Fair value assigned to assets acquired:
Land	1,792					1,686
Buildings	2,508					2,360
Property & equipment	494					465
Inventory	538					506
Final fair value of assets acquired	$ 5,332					€ 5,017
Business Acquisition, Pro Forma Information
Revenues | $				$ 57,555	$ 46,859
Net income | $				$ 6,772	$ 3,684
Weighted Average Number of Shares Outstanding
Basic | shares				8,838,984	8,822,488
Diluted | shares				9,498,578	9,259,553
Earnings Per Share, Basic and Diluted
Basic | $ / shares				$ 0.77	$ 0.42
Diluted | $ / shares				$ 0.71	$ 0.40