Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net Income	$ 257,266	$ 1,373,403
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	86,602	87,590
Amortization of deferred financing costs	24,939	37,039
Change in inventory reserve	(375,000)	90,000
Change in allowance for bad debts	2,329,907	232,510
Stock based compensation	115,659	37,014
Change in net deferred tax asset	139,165	669,861
(Increase) decrease in:
Accounts receivable	(29,285,881)	(16,991,782)
Due from PNC Bank	242,859	184,392
Accounts receivable - related parties	(1,170,088)	(610,604)
Inventories	(8,403,620)	(5,025,669)
Prepaid expenses and other current assets	(12,280)	38,241
Other non-current assets		(129)
Increase (decrease) in:
Accounts payable	20,816,821	9,421,489
Due to related parties	157,579	(297,336)
Accrued expenses	1,329,221	1,316,102
Obligations to customers for returns and allowances	(1,543)	(101,199)
Warranty provisions	706,468	567,372
Net cash used in operating activities	(13,041,925)	(8,971,706)
Cash flows from investing activities:
Purchase of property and equipment	(249,584)	(76,428)
Net cash used in investing activities	(249,584)	(76,428)
Cash flows from financing activities:
Net proceeds from revolving line of credit	11,548,522	8,103,991
Proceeds from bank term note	1,000,000
Payment of bank term note	(125,000)
Proceeds from exercise of stock options		6,400
Payment of deferred financing costs	(40,000)
Payment on subordinated debt - related party	(1,109,064)
Payments on capital lease		(1,078)
Net cash provided by financing activities	11,274,458	7,880,150
Net change in cash	(2,017,052)	(1,167,984)
Cash at beginning of period	2,305,439	2,116,490
Cash at end of period	288,387	948,506
Supplemental disclosures of cash flow information:
Cash paid for interest	76,868	53,107
Cash paid for income taxes	30,000
Ram Light Management, Ltd [Member]
Cash flows from financing activities:
Payment on note payable related party - Ram Light Management, Ltd.		$ (229,163)

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations.

+ References

No definition available.

+ Details

Name:	us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from the repayment of long-term borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in case of liquidation of the entity's assets or underlying collateral.

+ References

+ Details

Name:	us-gaap_RepaymentsOfSubordinatedDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=SMDM_RamLightManagementLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: