Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Oct. 13, 2016	Sep. 19, 2008
Deferred Revenue Arrangement [Line Items]
Inventory reserve		$ 67,000	$ 67,000
Revenue recognition, licensing contract term (years)		5 years
Advertising expense		$ 401,000	$ 399,000
Adjustments | Revenues
Deferred Revenue Arrangement [Line Items]
Adjustment to balances	$ 240,000
Minimum
Deferred Revenue Arrangement [Line Items]
Revenue recognition, royalty earned on licensing agreement (percent)		4.00%
Maximum
Deferred Revenue Arrangement [Line Items]
Revenue recognition, royalty earned on licensing agreement (percent)		6.00%
Buildings | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life		10 years
Buildings | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life		33 years
Trucks and automotive equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life		3 years
Trucks and automotive equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life		10 years
Shop machinery and equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life		3 years
Shop machinery and equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life		10 years
Land improvements | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life		10 years
Land improvements | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life		15 years
Office equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life		3 years
Office equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life		10 years
Stock options
Deferred Revenue Arrangement [Line Items]
Vesting period		3 years
Available shares for grant (up to) (in shares)				400,000	500,000
Restricted Stock Units
Deferred Revenue Arrangement [Line Items]
Vesting period		3 years
Granted (in shares)		103,000