EMPLOYEE INCENTIVE PLANS (Details) - USD ($)	12 Months Ended
Apr. 30, 2018	Apr. 30, 2017
401(k) Retirement Plan
Employee incentive plans
Employer contributions	$ 137,000	$ 86,000
Performance Bonus
Employee incentive plans
Discretionary bonus expense	71,000	0
Short Term Cash Incentive Plan
Employee incentive plans
Incentive plan expense	$ 0	0
Stock Award Plan \| Restricted Stock
Employee incentive plans
Restriction period of awards	5 years
Long Term Cash Incentive Plan
Employee incentive plans
Incentive plan expense	$ 0	$ 0

The expense during the period relating to discretionary performance bonuses.

No definition available.

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Namespace Prefix:	ttlo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The expense during the period relating to the incentive plan.

+ References

No definition available.

+ Details

Name:	ttlo_IncentivePlanExpense
Namespace Prefix:	ttlo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_AwardTypeAxis=ttlo_PerformanceBonusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=ttlo_ShortTermCashIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=ttlo_StockAwardPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_PlanNameAxis=ttlo_LongTermCashIncentivePlanMember
Namespace Prefix:
Data Type:	na
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Period Type: