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Income tax at the federal statutory rate is reconciled (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2018	Dec. 31, 2017	Oct. 31, 2017
Income taxes at federal statutory rate	$ 1,737		$ 79
State tax provision, net of federal tax benefit	170		6
Nondeductible differences:
Rel-Tech earn-out	(6)		(9)
Qualified domestic production activities deduction	(141)		(59)
Stock compensation	(204)		52
Meals and entertainment	8		12
Temporary true-ups	0		0
State tax refunds, net of federal expense	0		(3)
R& D credits	(111)		(37)
ASC 740-10 Liability	54		0
Tax Cut and Jobs Act	(34)		0
Other	(5)		21
Net provision (benefit) for income taxes	$ 1,468		$ 62
Income taxes at federal statutory rate (% of Pretax Income)	23.20%	35.00%	34.10%
State tax provision, net of federal tax benefit (% of Pretax Income)	2.30%		2.60%
Nondeductible differences: (% of Pretax Income)
Rel-Tech earn-out (% of Pretax Income)	(0.10%)		(3.90%)
Qualified domestic production activities deduction (% of Pretax Income)	(1.90%)		(25.40%)
Stock compensation (% of Pretax Income)	(2.70%)		22.40%
Meals and entertainment (% of Pretax Income)	0.10%		5.20%
Temporary true-ups (% of Pretax Income)	0.00%		0.00%
State tax refunds, net of federal expense (% of Pretax Income)	0.00%		(1.30%)
R& D credits (% of Pretax Income)	(1.50%)		(15.90%)
ASC 740-10 Liability (% of Pretax Income)	0.70%		0.00%
Tax Cut and Jobs Act (% of Pretax Income)	(0.50%)		0.00%
Other (% of Pretax Income)	(0.10%)		9.10%
Net provision (benefit) for income taxes (% of Pretax Income)	19.50%		26.90%

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- Definition

Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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