Business Combinations (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Feb. 28, 2017
Investment in businesses	$ 10,877,000	$ 4,170,000
Liabilities assumed	2,956,000	98,000
Debt issued	3,099,000	$ 575,000
Cash paid	7,778,000
Cash	326,000
Receivables	1,753,000
Prepaid expense	128,000
Equipment	1,904,000
Deposits and other	129,000
Finite-lived intangibles	4,566,000
Goodwill	5,027,000
Arborguard Tree Specialists Inc. [Member]
Liabilities assumed	2,934,000
Debt issued	2,724,000
Cash paid	7,200,000
Revenue reported by acquired entity for last annual period			$ 10,710,000
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Intangible Assets, Including Goodwill	$ 4,627,000